đŸ’„UPSC 2026, 2027 UAP Mentorship September Batch
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Artificial Intelligence (AI) Breakthrough

Optical Computing and AI with Light

Why in the News?

Finnish researchers showed that nonlinear optical fibres can perform AI tasks efficiently, advancing optical computing.

About Optical Computing:

  • Overview: A computer that uses light (photons) instead of electricity (electrons) to process data.
  • Why Important: Light is faster, makes less heat, and carries more data at once.
  • Technology Used: Runs through optical fibres, the same cables that carry internet data.
  • Main Challenge: Hard to control how light behaves, especially when it gets very strong and non-linear (changes colour, merges, or spreads).

Recent Breakthrough:

  • Research:
    • Turned images into light pulses.
    • Sent them through optical fibre where the light changed.
    • These changes acted like a hidden computing layer.
    • The system read the light at the other end to classify the images.
  • Results: Reached 91–93% accuracy, close to normal AI computers.

How can it help AI working?

  • Energy-efficient AI hardware: Can make faster and greener AI systems in the future.
  • Tech needs: New tools like photonic chips and optical neural networks before large-scale use.
[UPSC 2022] Which one of the following is the context in which the term “qubit” is mentioned?

(a) Cloud Services (b) Quantum Computing* (c) Visible Light Communication Technologies (d) Wireless Communication Technologies

 

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Global Geological And Climatic Events

Super Typhoon Ragasa

Why in the News?

China is planning to evacuate 4 lakh people ahead of the landfall of Super Typhoon Ragasa.

Super Typhoon Ragasa

About Typhoon & Super Typhoon:

  • Typhoon: A tropical cyclone forming in the Western Pacific Ocean and China Sea, usually above sea temperatures of 27°C.
  • Formation: Warm, moist air rises and creates a low-pressure system with spiralling winds.
  • Super Typhoon: Defined by the US Joint Typhoon Warning Center (JTWC) as sustained winds of ≄240 km/h (some agencies use 185 km/h).
  • Structure:
    • Eye: Calm centre.
    • Eyewall:  Strongest winds and rainfall.
    • Spiral Rainbands: Bands of showers spreading outward.
  • Impacts: Can cause storm surges, coastal flooding, landslides, and destruction of infrastructure, agriculture, and homes.

Back2Basics: Tropical Cyclones

  • What is it: Large low-pressure systems over warm oceans, marked by rotating winds, heavy rain, and storm surges.
  • Conditions: Form when ocean temps >27°C, with moist rising air releasing latent heat to fuel convection.
  • Rotation: Driven by the Coriolis force – anticlockwise in Northern Hemisphere, clockwise in Southern.
  • Structure: Eye (calm), Eyewall (violent winds/rains), Rainbands (widespread showers).
  • Regional Names: Typhoons (Pacific), Hurricanes (Atlantic/Caribbean), Cyclones (Indian Ocean).
  • Drivers & Frequency: Common in Southeast Asia due to warm Pacific waters, El Niño/La Niña cycles, and climate change.
  • Impacts: Loss of life, property damage, flooding, soil salinisation, displacement, and disease outbreaks.
  • Climate Change Link: Global warming is making tropical cyclones stronger, less predictable, and more frequent, raising risks for coastal populations.

 

[UPSC 2020] Consider the following statements:

1. Jet streams occur in the Northern Hemisphere only.

2. Only some cyclones develop an eye.

3. The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.

Which of the statements given above is/are correct?

Options: (a) 1 only (b) 2 and 3 only (c) 2 only * (d) 1 and 3 only

https://www.thehindu.com/news/international/china-to-evacuate-4-lakh-as-super-typhoon-ragasa-approaches/article70080064.ece

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Global Geological And Climatic Events

Earth gains new tiny ‘Quasi-Moon’ 2025 PN7

Earth gains new tiny 'Quasi-Moon' 2025 PN7

Why in the News?

Astronomers have confirmed the discovery of asteroid 2025 PN7, Earth’s latest quasi-moon.

About Quasi-Moon 2025 PN7:

  • Discovery: First detected on 2 August 2025 by the Pan-STARRS 1 telescope in Hawaii; confirmed in September 2025 as Earth’s newest quasi-satellite.
  • Orbit: Circles the Sun, not Earth, but remains near Earth due to a 1:1 orbital resonance – meaning it completes one solar orbit in the same time as Earth.
  • Distance from Earth: At closest, ~299,000 km, similar to the Moon’s distance.
  • Physical Traits: Roughly 19 metres wide, very faint (magnitude 26.4), requiring large telescopes to track.
  • Orbital Parameters: Semi-major axis 1.003 AU (same as Earth), eccentricity 0.108 (slightly oval), inclination just under 2°.
  • Arjuna Nature: Fits the Arjuna asteroid class criteria – extremely Earth-like orbit, low eccentricity, and low inclination, making it appear as a temporary companion.
  • Stability: Expected to remain a quasi-satellite for ~128 years before shifting into another orbital configuration.

What is the Arjuna Asteroid Class?

  • Overview: A rare group of near-Earth objects (NEOs) with orbits closely matching Earth’s path around the Sun.
  • Etymology: Originated with the discovery of asteroid 1991 VG by astronomer Robert H. McNaught at the Siding Spring Observatory in Australia in 1991.
  • Name Origin: Inspired by Arjuna from the Mahabharata – symbolising fast-moving and elusive objects.
  • Special Traits:
    • Can approach Earth more closely than most asteroid families.
    • Sometimes become temporary mini-moons or quasi-satellites.
    • Have relatively low relative velocities, making them attractive for spacecraft missions.
  • Scientific Importance:
    • Offer natural laboratories for studying orbital resonance and gravitational effects.
    • Useful for testing asteroid mining and redirection technologies.
    • Significant for planetary defence, since tracking their movements refines collision risk predictions.
[UPSC 2023] Consider the following pairs:

Object in space – Description

1. Cepheids – Giant clouds of dust and gas in space

2. Nebulae – Stars which brighten and dim periodically

3. Pulsars – Neutron stars that, are formed when massive stars run out of fuel and collapse

How many of the above pairs are correctly matched?

(a) Only one * (b) Only two (c) All three (d) None

 

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Nuclear Energy

[22nd September 2025] The Hindu Op-ed: Uranium unrest: On uranium mining in Meghalaya

PYQ Relevance

[UPSC 2018] Policy contradictions among various competing sectors and stakeholders have resulted in inadequate ‘protection and prevention of degradation’ to the environment. Comment with relevant illustration

Linkage: The uranium mining push in Meghalaya illustrates a clear policy contradiction, India’s strategic and energy security imperatives versus constitutional safeguards for Scheduled/Tribal Areas and environmental sustainability. The Centre’s OM exempting uranium from public consultation shows how national security priorities often override local consent and ecological concerns, leading to inadequate protection. Thus, it serves as a live illustration of competing sectoral interests producing environmental degradation risks.

Mentor’s Comment

India’s renewed push for uranium mining in Meghalaya, despite strong tribal opposition, has reopened debates on resource governance, environmental justice, and constitutional safeguards. For UPSC aspirants, this case is not only about Meghalaya but about how India manages its uranium reserves, balances national security with sustainability, and navigates the tensions between state imperatives and community consent. This article integrates the editorial’s concerns with a broader analysis of uranium mining in India and its implications.

Introduction

The Union Environment Ministry’s office memorandum (OM) exempting uranium and other strategic minerals from public consultation has intensified unrest in Meghalaya. Tribal Khasi groups, opposing uranium extraction since the 1980s, see this as a denial of their constitutional and cultural rights. At the same time, India’s nuclear ambitions make uranium strategically vital. This tension between energy security and indigenous consent places India at a crucial crossroads of democratic governance and resource management.

Why is this in the news?

The Centre’s attempt to mine uranium in Meghalaya, against the backdrop of decades-long opposition, is a landmark moment in India’s mineral politics. For the first time, an executive order (OM) has bypassed community consultations for uranium mining. Given the toxic environmental footprint of uranium mining and its irreversible impact on tribal lands, the issue has become both a governance crisis and an ecological flashpoint.

What is the history of uranium mining resistance in Meghalaya?

  1. Khasi opposition since the 1980s: Resistance in Domiasiat and Wahkaji has endured for four decades.
  2. Distrust from Jharkhand experience: Singhbhum mines faced protests due to radiation exposure and livelihood loss.
  3. Procedural unfairness: Hearings often conducted in unfamiliar languages, ignoring objections.

Why is the new Office Memorandum controversial?

  1. Exempts strategic mineral mining from public consultation, silencing affected communities.
  2. Issued without parliamentary scrutiny, showing executive overreach.
  3. Weakens constitutional safeguards, turning stewards of the land into bystanders in decisions affecting their survival.

What constitutional and legal protections are at stake?

  1. Sixth Schedule: Khasi Hills Autonomous District Council may invoke its autonomy.
  2. Judicial precedents: Niyamgiri (2013) recognized the primacy of tribal consent.
  3. Fifth and Sixth Schedules: Provide a strong legal basis for resistance.
  4. Global principle of FPIC (Free, Prior, and Informed Consent): Ignored in this decision.

Why is uranium mining a risky proposition?

  1. Environmental hazards: Radioactive waste and contamination of water sources.
  2. Human health risks: Increased cases of radiation-linked illnesses reported in Singhbhum.
  3. Cultural disruption: Tribal communities lose ancestral land and cultural heritage.
  4. Short-term security vs long-term sustainability: Overemphasis on uranium undermines renewable energy pathways.

Uranium Mining in India – An Overview

Where is uranium mined in India?

  1. Jharkhand (Singhbhum district): Oldest uranium mines; key hub of Uranium Corporation of India Limited (UCIL).
  2. Andhra Pradesh (Tummalapalle, Kadapa district): Estimated to be one of the world’s largest uranium reserves (~150,000 tonnes).
  3. Telangana (Nalgonda district): Lambapur-Peddagattu reserves.
  4. Meghalaya (Domiasiat, Wahkaji): Rich reserves but stalled due to tribal opposition.
  5. Rajasthan (Rohil in Sikar district): Exploratory work underway.

What are the requirements and process of uranium mining?

  1. Requirement of Environmental Clearances: Normally includes public consultation, impact assessments, and Forest Rights Act compliance (bypassed in the new OM).
  2. Mining process:
    • Open-cast mining: Surface excavation, highly polluting.
    • Underground mining: Safer but expensive.
    • Processing: Crushing ore, followed by leaching (acid/alkaline) to extract uranium oxide (yellowcake).
    • Radiation management: Requires robust safeguards in waste disposal, tailing ponds, and worker protection—areas where India has faced criticism.

India’s standing in global uranium context

  1. Global reserves: Australia, Kazakhstan, Canada, Russia dominate.
  2. India’s share: About 1-2% of world reserves, modest compared to global leaders.
  3. Import dependence: Despite domestic efforts, India imports uranium from Kazakhstan, Russia, Uzbekistan, Canada.
  4. Nuclear energy contribution: Currently ~3% of India’s electricity; goal is 9-10% by 2040.

Implications for India

  1. Energy security: Indigenous uranium critical for India’s nuclear power expansion under India’s three-stage nuclear program.
  2. Geopolitical leverage: Imports expose India to supply shocks and diplomatic constraints.
  3. Environmental justice: Mining projects risk alienating tribal populations and worsening ecological fragility.

How should the state respond?

  1. Withdraw the OM to restore procedural legitimacy.
  2. Respect community consent to prevent democratic erosion.
  3. Explore alternatives like thorium-based nuclear energy (where India has rich reserves) and renewable energy strategies.
  4. Promote dialogue, not coercion, to avoid long-term alienation of tribal groups.

Conclusion

The uranium debate in Meghalaya is about much more than mining, it is about the soul of Indian democracy. By sidelining constitutional protections and environmental concerns, the state risks sacrificing long-term legitimacy for short-term gains. India’s future energy security cannot come at the cost of tribal survival, ecological stability, and democratic consent. A sustainable pathway lies in inclusive governance, diversified energy strategies, and respect for constitutional safeguards.

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The Crisis In The Middle East

U.K, Australia and Canada recognise Palestine state in seismic shift

Introduction

On September 22, 2025, Britain, Australia, and Canada formally recognised Palestine as a sovereign state, a step that Portugal and potentially France are expected to follow at the UN General Assembly. This unprecedented shift, especially by G-7 members like the U.K. and Canada, alters decades of Western foreign policy and signals mounting pressure on Israel after nearly two years of the Gaza war that began with Hamas’s October 7, 2023 attack. While hailed as historic by Palestinians, Israel’s Prime Minister Benjamin Netanyahu condemned the move as an “absurd reward for terrorism.”

Why is this development historic?

  1. First G-7 recognition: U.K. and Canada became the first G-7 nations to officially recognise Palestine, breaking with the long-standing Western alignment with Israel.
  2. Sharp contrast with past policy: For decades, Western countries had deferred recognition pending a negotiated two-state solution; this marks a direct policy shift.
  3. Conflict backdrop: The recognition comes amid international outrage over prolonged violence in Gaza since 2023, highlighting the urgency for peace.
  4. Special burden: The U.K.’s Deputy PM admitted Britain carries a “special responsibility” due to the 1917 Balfour Declaration, which paved the way for Israel’s creation.

Why did the U.K., Australia, and Canada take this step?

  1. Reviving peace hopes: Leaders like Keir Starmer emphasised the recognition as a way to keep the two-state solution alive.
  2. International pressure: Growing calls for humanitarian accountability in Gaza pushed these governments to act.
  3. Alignment with Europe: Portugal announced recognition the same day, and France is expected to follow, indicating a coordinated Western European push.

What has been Israel’s reaction?

  1. Harsh opposition: PM Netanyahu warned that calls for Palestinian statehood “endanger Israel’s existence.”
  2. Terrorism narrative: Israel frames recognition as a “reward for terrorism” in reference to Hamas’s October 7, 2023 attack.
  3. UN strategy: Netanyahu vowed to fight this recognition diplomatically at the ongoing UN General Assembly.

What role does history play in this debate?

  1. Balfour Declaration, 1917: U.K.’s role in facilitating Israel’s creation still casts a shadow over West Asia’s conflict.
  2. Decades of stalemate: Palestinian statehood has been promised but deferred since the Oslo Accords of the 1990s.
  3. Burden of colonial legacy: Britain’s recognition is seen as part-redressal for its historical role.

How does this reshape global geopolitics?

  1. U.S.–Western divide: Recognition creates divergence between U.S. policy (still opposed) and its closest allies like the U.K. and Canada, weakening the coherence of the Western bloc.
  2. Global South solidarity: Developing nations, many of whom already recognise Palestine, view this as overdue Western alignment, strengthening South–North convergence on justice and decolonisation.
  3. UN spotlight: With the General Assembly opening, Palestine’s legitimacy is expected to dominate the global agenda, elevating the conflict as a test case for multilateralism.
  4. Regional fault lines: Arab states may gain renewed diplomatic leverage, while Israel risks isolation beyond its traditional U.S. support base, potentially altering Middle East power balances.
  5. Strategic recalibration for India and Asia: Asian powers like India and China will have to navigate between historical solidarity with Palestine and strong bilateral partnerships with Israel, testing their strategic autonomy.
  6. Narrative of international law and legitimacy: Recognition by major Western democracies strengthens the normative argument for Palestinian statehood, challenging Israel’s framing of the issue as a security-only concern.

Conclusion

The recognition of Palestine by the U.K., Australia, and Canada is more than symbolic; it could catalyse a chain reaction of Western nations acknowledging Palestinian sovereignty. While it reignites hope for a two-state solution, it also risks deepening fault lines with Israel and the U.S.

PYQ Relevance

[UPSC 2018] India’s relations with Israel have, of late, acquired a depth and diversity, which cannot be rolled back.” Discuss

Linkage: The recognition of Palestine by U.K., Australia, and Canada highlights how global powers are recalibrating their West Asia policies, creating new pressures on countries like India. While India recognised Palestine in 1988, it has simultaneously built deep and diverse ties with Israel in defence, agriculture, and technology. This mirrors the PYQ’s core theme—India’s Israel relationship is now structurally entrenched, even as balancing Palestine’s cause remains a diplomatic necessity.

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Economic Indicators and Various Reports On It- GDP, FD, EODB, WIR etc

Why low inflation is the problem

Introduction

Inflation in India has sharply declined in recent months, with CPI inflation at 2.27% (Aug 2024) and WPI inflation at just 0.52%. While households welcome subdued prices, this development has unsettled the government’s fiscal math. Nominal GDP growth, which forms the base for budget projections, has weakened. As a result, targets for revenue, deficit, and debt are under stress. This shift highlights the complex relationship between inflation, nominal GDP, and fiscal sustainability.

The Problem with Low Inflation

Why is low inflation in the news?

India is currently witnessing one of the weakest inflation trajectories in recent years, with both CPI and WPI at historic lows. This is striking because inflation had been consistently higher earlier, often troubling households and RBI alike. Now, for the first time in years, inflation is falling so low that it is below the government’s own expectations, threatening fiscal stability. While consumers benefit from cheaper goods, the government risks losing lakhs of crores in projected revenue.

Breaking Down the Fiscal Arithmetic

What is the link between inflation and government finances?

  1. GDP measure: Nominal GDP = monetary value of goods/services at current prices, before adjusting for inflation.
  2. Government’s reliance: Budget estimates are framed on nominal GDP, not real GDP.
  3. Importance: Nominal GDP forms the denominator for deficit and debt ratios, making it central to fiscal health.

How is low inflation disrupting budget math?

  1. Union Budget FY25-26 assumption: Nominal GDP growth at 10.5%, implying GDP of â‚č357 lakh crore.
  2. Reality: Q1 nominal GDP growth just 8%, well below target.
  3. Revenue impact: FY26 central govt. net tax revenue projected at â‚č33.1 lakh crore; lower inflation could cut receipts by â‚č57,314 crore.

Why is nominal GDP growth so crucial?

  1. Fiscal deficit & debt ratio: Targets (fiscal deficit 4.4%, debt-GDP ratio 56.1%) are achievable only if nominal GDP grows as expected.
  2. Current scenario: With weak inflation, nominal GDP falls, making deficit/debt appear larger relative to GDP.
  3. Result: Fiscal stress and need for adjustments in spending or borrowing.

Is low inflation always bad?

  1. Positive side: Consumers enjoy stable prices, reduced cost of living, relief from food price spikes.
  2. Negative side: Weak inflation = lower nominal GDP = poor revenue realization for the government.
  3. RBI view: Deputy Governor (May 2024) warned that while lower prices help consumers, oversupply and weak pricing power can dampen private investment and industrial margins.

What are the long-term risks?

  1. Corporate health: Lower pricing power can affect profits, discouraging capex.
  2. Employment: Weak demand growth can limit job creation.
  3. Cycle of slowdown: Weak inflation → lower nominal GDP → fiscal squeeze → reduced spending → slower growth.

Conclusion

Low inflation, though a blessing for households, poses structural challenges for India’s fiscal health. When inflation falls below government assumptions, it erodes revenue potential and distorts deficit ratios, threatening fiscal sustainability. Policymakers thus face the paradox of balancing consumer welfare with fiscal prudence. For India, the task ahead is not merely curbing inflation but maintaining it at an optimal, stable level to sustain growth, revenue, and investment.

PYQ Relevance

[UPSC 2019] Do you agree with the view that steady GDP growth and low inflation have left the Indian economy in good shape? Give reasons in support of your arguments.

Linkage: The question assumes that low inflation alongside steady GDP growth indicates economic strength. However, as the article shows, low inflation with weak nominal GDP growth can actually strain fiscal math, reduce revenues, and slow investment. Thus, while consumers benefit, the economy may not necessarily be in “good shape” if fiscal sustainability and growth momentum are undermined.

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Agmark, Hallmark, ISI, BIS, BEE and Other Ratings

Centre to simplify Quality Control Order (QCO) framework

Why in the News?

A NITI Aayog panel has proposed easing India’s Quality Control Orders (QCOs) by simplifying certification, assessments, and inspections to support MSMEs amid domestic and global criticism.

About Quality Control Orders (QCOs):

  • Overview: Issued under the Bureau of Indian Standards (BIS) Act, 2016, QCOs make Indian Standards compulsory for specific products in public interest (health, environment, security, fair trade).
  • Voluntary vs. Mandatory: Normally BIS certification is voluntary, but under QCOs manufacturers/importers must obtain a BIS licence or Certificate of Conformity before production, imports, or sales.
  • Standard Mark: Products under QCOs carry the ISI mark (or Hallmark for jewellery) to indicate conformity.
  • Legal Backing: Governed by BIS (Conformity Assessment) Regulations, 2018; violation punishable with fines or imprisonment.
  • Imports: Applies equally to foreign manufacturers via the Foreign Manufacturers Certification Scheme (FMCS).
  • Coverage: Of ~23,000 BIS standards, only 187 QCOs covering 770 products exist; 84 QCOs covering 343 products issued in the last three years.
  • Example: QCOs for compressors & ACs (2023) boosted compressor output from <2 million (2021–22) to 8 million (2023–24); ACs to 12 million+ units.

Challenges Related to QCOs:

  • High Costs: Certification involves inspections, documents, and assessments—burdening MSMEs.
  • Non-Tariff Barrier Issues: US, EU, UK, NZ claim India’s QCOs exceed global norms. USTR (2025) flagged BIS marks even for chemicals, requiring site visits.
  • Industry Pushback: MSMEs fear inflationary costs; imports of cheaper raw materials/components restricted.
  • Limited Enforcement: Only 187 of 23,000 standards notified, mainly steel, electronics, chemicals.
  • Implementation Delays: Licence approvals slow; procedures disrupt production and supply chains.
  • Conflicting Views: Some MSMEs benefit (e.g., Birla Aircon turnover jumped â‚č7 crore to â‚č42 crore after QCO on water coolers), others call it “malign intervention” (NITI Aayog VC Suman Berry).

Steps Taken by Government:

  • Digitisation: Simplified certification covering 750+ products; licences granted in 30 days.
  • MSME Outreach:
    • Jan Sunwai: Online open-house thrice weekly.
    • Manak Manthan: BIS field initiative for MSME support.
    • Regional Conferences: Led by Department of Consumer Affairs to resolve issues.
  • Capacity Building: Of 50,753 BIS certifications, ~40,000 (≈80%) issued to MSMEs; 24,625 voluntarily obtained for credibility/exports.
  • Trade Readiness: Govt projects QCOs as tools to raise quality and global competitiveness.
  • WTO Consistency: Justified if linked to health, safety, environment, deceptive trade, or security, in line with WTO Technical Barriers to Trade (TBT) Agreement.
[UPSC 2017] With reference to `Quality Council of India (QCI)’, consider the following statements:

1. QCI was set up jointly by the Government of India and the Indian Industry.

2. Chairman of QCI is appointed by the Prime Minister on the recommendations of the industry to the Government.

Which of the above statements is/are correct?

Options: (a) 1 only (b) 2 only (c) Both 1 and 2* (d) Neither 1 nor 2

 

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International Space Agencies – Missions and Discoveries

Extreme Nuclear Transients (ENTs) and the Big Bang

Extreme Nuclear Transient

Why in the News?

New research by the University of Hawaii has discovered Extreme Nuclear Transients (ENTs), the most powerful explosions since the Big Bang, surpassing even gamma-ray bursts (GRBs) in energy output.

Back2Basics: Big Bang

  • Proponent: In 1927 by Georges LemaĂźtre.
  • Timeline: Universe originated ~13.7–13.8 billion years ago from a singularity.
  • Phases: Began with cosmic inflation, followed by expansion, cooling, and formation of matter, light, and four fundamental forces.
  • Cosmic Evolution: Led to atoms, stars, galaxies, and planets; universe still expanding.
  • Evidence: Supported by cosmic microwave background radiation and Hubble’s observations of galaxy redshifts.

About Extreme Nuclear Transients (ENTs):

  • Discovery: First reported by astronomers at the University of Hawaii’s Institute for Astronomy (IfA).
  • Cause: Triggered when massive stars (≄3 times Sun’s mass) are torn apart by supermassive black holes at galactic centers.
  • Energy Output: Release ten times more energy than gamma-ray bursts (GRBs), earlier considered the brightest cosmic events.
  • Duration: Remain luminous in radio wavelengths for years, unlike short-lived bursts.

How ENTs differ from other cosmic events?

  • Gamma-Ray Bursts (GRBs): They come from collapsing stars or mergers; short-lived but highly energetic. ENTs are more powerful and last longer.
  • Tidal Disruption Events (TDEs): TDEs also shred stars, but ENTs involve larger black holes and massive stars, making them rarer.
  • Fast X-ray Transients (FXTs): They are faint, brief X-ray bursts from trapped jets in supernovae. ENTs are brighter, multi-wavelength, and more energetic.

Scientific Importance of ENTs:

  • Most Energetic Events: Represent the most powerful class of transients ever observed.
  • Black Hole Studies: Offer insights into supermassive black hole dynamics and their role in galactic evolution.
  • Early Universe Clues: Help probe massive stars soon after galaxy formation.
  • Future Observations: Key targets for next-generation telescopes like the Vera C. Rubin Observatory and Nancy Grace Roman Space Telescope.
[UPSC 2012] Which of the following is/are cited by the scientists as evidence for the continued expansion of the universe?

1. Detection of microwaves in space

2. Observation of redshift phenomenon in space

3. Movement of asteroids in space

4. Occurrence of supernova explosions in space

Select the correct answer using the code given below:

(a) 1 and 2 * (b) 2 only (c) 1, 3 and 4 (d) None of the above.

 

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Innovations in Sciences, IT, Computers, Robotics and Nanotechnology

How different are Supercomputers to normal computers?

Why in the News?

This newscard is an excerpt from the original article published in The Hindu.

What is a Supercomputer?

  • Overview: A high-performance computing system capable of trillions to quintillions of calculations per second.
  • Parallel Computing: Uses thousands of processors working together instead of relying on a single fast processor.
  • Applications: Climate modelling, nuclear simulations, black hole research, drug discovery, and artificial intelligence training.
  • Performance Measure: FLOPs (floating-point operations per second); advanced machines now achieve exaflop levels (10Âč⁞ calculations/sec).

How Supercomputers Differ from Normal Computers

  • Speed: Laptops perform billions of FLOPs; supercomputers perform quintillions.
  • Parallelism: PCs use one or few processors; supercomputers employ thousands to millions of cores.
  • Structure: Built of interconnected nodes (processor + memory bundles) linked by ultra-fast networks.
  • Storage: Manage petabytes of data, unlike gigabytes/terabytes in personal devices.
  • Cooling & Power: Need specialised cooling (water/immersion) and consume electricity equal to a small town.
  • Usage: PCs run interactive apps; supercomputers run scheduled jobs remotely for scientists and researchers.

India’s journey in Supercomputing:

  • Early Efforts: Began with C-DAC’s PARAM 8000 (1991) after Western import restrictions.
  • National Supercomputing Mission (2015): Jointly by DST & Ministry of Electronics and IT; implemented by C-DAC and IISc to build 70+ systems.
  • Major Systems (2025):
    • AIRAWAT-PSAI (C-DAC, Pune) – fastest in India (8.5 PF, global rank 136).
    • PARAM Siddhi-AI – global AI leader.
    • Pratyush (IITM, Pune) – weather & climate (3.76 PF).
    • Mihir (NCMRWF, Noida) – medium-range weather (2.57 PF).
    • PARAM Pravega (IISc, Bengaluru) – academic use (>3.3 PF).
  • Indigenous Push: PARAM Rudra (2024) with Indian servers and software stack.
  • Applications: Monsoon forecasting, Himalayan research, defence simulations, AI, drug design, materials science.
  • Current Capacity: 34+ supercomputers with ~35 petaflops; plans for exascale systems underway.
[UPSC 2014] Param Padma, which was in the news recently, is:

(a) a new Civilian Award instituted by the Government of India

(b) the name of a supercomputer developed by India *

(c) the name given to a proposed network of canals linking northern and southern rivers of India

(d) a software programme to facilitate e-governance in Madhya Pradesh

 

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Biofuel Policy

Is it feasible to blend Isobutanol and Diesel? 

Why in the News?

The Union Transport Minister has announced that the Automotive Research Association of India (ARAI) is studying the feasibility of blending Isobutanol with Diesel after ethanol–diesel blending attempts failed.

About Isobutanol:

  • What is it: A four-carbon alcohol (C₄H₁₀O), clear, flammable, and traditionally used as a solvent in paints, coatings, and chemical industries.
  • Production: Derived either from petrochemical processes or by fermenting sugarcane, molasses, and grains with engineered microbes.
  • Fuel Properties:
    • Higher energy density than ethanol, closer to diesel.
    • Lower hygroscopicity (absorbs less water), reducing rust and corrosion in engines and pipelines.
    • Higher flash point than ethanol, making it safer for storage and transport.

Isobutanol–Diesel Blending and Benefits:

  • Compatibility: Unlike ethanol, isobutanol blends well with diesel without extra chemicals.
  • Economic Feasibility: Can be produced in existing ethanol plants with minor changes.
  • Agricultural Support: Creates demand for sugarcane by-products, helping farmers and managing sugar surplus.
  • Energy Security: Reduces reliance on imported fossil fuels and saves foreign exchange.
  • Global First: Pilot studies may make India the first country to use isobutanol–diesel blends.

Challenges and Risks:

  • Combustion Issues: Has a lower cetane number than diesel, causing poor combustion quality.
  • Engine Risks: Can trigger diesel knock (uneven burning, power loss, engine damage).
  • Mixing Limitations: Blending challenges exist but can be partly solved with biodiesel addition.
  • Cost Factor: Requires additives to restore cetane number, increasing costs.
  • Blending Limit: Experts suggest ≀10% blending to avoid harm.
  • Pilot Phase: Testing will take ~18 months before possible large-scale adoption.
[UPSC 2020] With reference to green hydrogen, consider the following statements:

1. It can be used directly as a fuel for internal combustion.

2. It can be blended with natural gas and used as fuel for heat or power generation.

3. It can be used in the hydrogen fuel cell to run vehicles.

How many of the above statements are correct?

Options: (a) Only one (b) Only two (c) All three* (d) None

 

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Air Pollution

‘Smog-eating’ photocatalytic coatings on roads to curb pollution

Why in the News?

Delhi government has announced a feasibility study to test photocatalytic coatings on roads, pavements, and public spaces to bring visible improvements in air quality.

About Smog:

  • Overview: Combination of smoke and fog, forming smoky fog with soot, gases, and moisture.
  • Components: Includes soot particulates, sulphur dioxide (SO₂), nitrogen dioxide (NO₂), hydrocarbons, carbon monoxide (CO), and ozone (O₃).
  • Types:

    1. Sulfurous Smog (London Smog) – Caused by burning coal and sulphur-bearing fuels; worsened by dampness and particulates.
    2. Photochemical Smog (Los Angeles Smog) – Produced when NOₓ and hydrocarbons react under sunlight, forming ozone; appears as a brownish haze with respiratory effects.
  • Pollutants:

    1. Primary pollutants: Directly emitted (NO₂, SO₂, hydrocarbons).
    2. Secondary pollutants:  Formed via reactions (ozone, acid rain).
  • Haze vs. Smog: Haze = dry particles reducing visibility; Smog = pollutants with condensation.
  • Effects: Respiratory distress, eye irritation, plant damage, reduced visibility, carcinogenic risk, worsened by inversion layers and low rainfall.

What are “Smog-Eating” Coatings?

  • Technology: Photocatalytic coatings using titanium dioxide (TiO₂) on roads, pavements, and public surfaces.
  • Function: Under sunlight, TiO₂ breaks down pollutants like NO₂ and hydrocarbons into less harmful compounds.
  • Advantages: Low-cost, stable, compatible with traditional materials, effective in depollution and creating self-cleaning surfaces.

Delhi Government Plan

  • Plan: If viable, Cabinet proposal for citywide rollout at busy corridors, markets, and public spaces.
  • Evaluation: Study to assess cost-effectiveness, safety, and sustainability while shortlisting suppliers.
  • Strategic Context: Part of a 24×7, year-round environmental action plan using technology-driven interventions.
[UPSC 2013] Photochemical smog is a resultant of the reaction among-

(a) NO₂, O₃ and peroxyacetyl nitrate in the prescence of sunlight *

(b) CO₂, O₂, and peroxyacetyl nitrate in the presence of sunlight

(c) CO, CO₂, and NO₂ at low temperature

(d) high concentration of NO₂, O₃ and CO in the evening

 

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Terrorism and Challenges Related To It

[20th September 2025] The Hindu Op-ed: The Saudi-Pakistan pact is a dodgy insurance policy

PYQ Relevance:

[UPSC 2018] In what ways would the ongoing US–Iran Nuclear Pact controversy affect the national interest of India? How should India respond to this situation?

Linkage: The Saudi–Pakistan SMDA, like the earlier US–Iran Nuclear Pact controversy, reshapes West Asian alignments and directly impacts India’s energy security, diaspora safety, and regional stability. Just as India had to balance between Iran, the U.S., and Gulf partners in 2018, it must now carefully hedge between Riyadh and Islamabad while safeguarding its own strategic interests.

Mentor’s Comment

The Strategic Mutual Defence Agreement (SMDA) signed between Saudi Arabia and Pakistan in September 2025 has been described as a pact of optics rather than substance. Its timing, context, and asymmetrical calculations raise questions on whether it strengthens West Asian security or merely signals short-term adjustments. For UPSC aspirants, this episode provides insights into the shifting geopolitics of South West Asia, Pakistan’s strategic opportunism, Saudi Arabia’s security dilemmas, and India’s balancing role.

Introduction

On 17 September 2025, Saudi Crown Prince Mohammed bin Salman and Pakistani Premier Shahbaz Sharif signed the Strategic Mutual Defence Agreement (SMDA) in Riyadh, with Field Marshal Asim Munir in attendance. While presented as a landmark pact, its real significance lies in the optics of security reassurance amid the shifting sands of Middle Eastern politics. Both nations have a chequered past of military cooperation, rooted in shared faith but divided by divergent threat perceptions. The agreement’s asymmetrical benefits, U.S. undertones, and implications for India make it geopolitically consequential.

Why is the SMDA in the news and why is it significant?

  1. First major pact in decades: The last high-point of Saudi–Pakistan defence ties was in the 1979–89 period, when 20,000 Pakistani troops protected Saudi Arabia and the Holy Harams.
  2. Optical reassurance: The SMDA is viewed more as a symbolic gesture than a substantive alliance, designed to show unity amidst rising threats from Iran, Yemen, and Israel.
  3. Geopolitical urgency: Triggered by the September 9 Israeli air strike in Doha (Qatar), the pact signals waning U.S. credibility as a security guarantor for the Gulf.
  4. Big deal: Pakistan is now a declared nuclear state, raising speculation of nuclear cooperation with Riyadh, though practical transfer remains improbable.

What has been the history of Saudi-Pakistan defence cooperation?

  1. Golden phase (1979–89): 20,000 Pakistani soldiers stationed in Saudi Arabia to protect the monarchy and act against Iran and Yemen.
  2. Saudi view: Treated Pakistani forces as paid Praetorian Guards, limiting their autonomy.
  3. Pakistani view: Resented lack of command; exclusion of Shia troops created tensions.
  4. 1990 onwards: Pakistan refused Saudi requests during major crises (Iraq’s Kuwait invasion, Yemeni war), limiting its role to protecting the Holy Harams.

How has the United States influenced the SMDA?

  1. Pentagon as the guarantor: U.S. historically underpinned Saudi–Pak defence ties “over-the-horizon.”
  2. Trump’s role: In June 2025, Field Marshal Munir’s “private lunch” with Trump in Washington signalled Washington’s blessing.
  3. Israeli factor: Saudi Arabia wanted a U.S. defence pact and nuclear technology in exchange for recognising Israel. The Hamas attack on Israel in Oct 2023 derailed the plan, leaving the SMDA as a consolation prize.
  4. Credibility gap: The U.S. failure to defend Qatar against Israeli strikes exposed fragility in Gulf security guarantees.

What are Riyadh’s calculations from the SMDA?

  1. Avoid Arab troops: Past experience with Arab/Turkish troops created risks of “political pollination.
  2. Massive arms imports: Saudi Arabia has ordered $100 billion worth of U.S. weapons in 2025.
  3. Nuclear hedge: Pakistan’s nuclear capability could deter Iran if it goes nuclear.
  4. Chinese factor: Pakistan’s ties with China may complicate Riyadh’s trust.
  5. Realistic expectation: Riyadh foresees smaller Pakistani footprints than before, given past frictions.

What are Islamabad’s calculations from the SMDA?

  1. Asymmetrical gains: No intention to fight Saudi wars against Iran, Yemen, or Israel.
  2. Strategic opportunism: Exploit Saudi insecurity to gain funds, oil, defence hardware, and training.
  3. Personal aggrandisement:Pakistan’s military elite aim to monetise “IOUs” from Riyadh and Washington.
  4. Regional calculus: Hopes trilateral axis will offset its strategic disadvantage against India.

What does the SMDA mean for India?

  1. Energy linkages: India is the third-largest oil importer and among Saudi’s top trade partners.
  2. Diaspora factor: Largest expatriate community in Saudi Arabia, valued for skills and neutrality.
  3. Diplomatic capital: Post-2014 outreach has created defence and intelligence-sharing frameworks.
  4. Saudi balancing act: Riyadh assured Reuters that ties with India remain “robust,” acknowledging India’s nuclear status and geoeconomic heft.
  5. Implication: India must remain vigilant, building greater Arabian Sea synergies to counterbalance tactical moves by Pakistan.

Conclusion

The Saudi–Pakistan pact is less a robust security alliance and more a political insurance policy, crafted in haste amid shifting regional dynamics. While it temporarily reassures Riyadh and monetarily benefits Islamabad, its sustainability remains doubtful due to divergent threat perceptions, nuclear sensitivities, and overlapping U.S.–China rivalries. For India, the SMDA underscores the need to strengthen its energy diplomacy, diaspora leverage, and strategic partnerships with Riyadh, while maintaining watchfulness over Pakistan’s manoeuvres.

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Health Sector – UHC, National Health Policy, Family Planning, Health Insurance, etc.

A climate-health vision with lessons from India

Introduction

At the Global Conference on Climate and Health (July 2025, Brazil), 90 countries shaped the Belém Health Action Plan, which will guide the climate-health agenda at COP30 (Nov 2025). Ironically, India, despite having some of the most instructive welfare experiences linking climate and health, was not officially represented, a missed opportunity to emerge as a global exemplar.

India’s non-health interventions like the Pradhan Mantri Poshan Shakti Nirman (PM POSHAN), Swachh Bharat Abhiyan, Mahatma Gandhi National Rural Employment Guarantee Act (MNREGA), and Pradhan Mantri Ujjwala Yojana (PMUY) offer rich lessons for operationalising an integrated climate-health framework. They reveal that intentional, intersectoral action can yield multiple dividends: improved nutrition, reduced pollution, restored ecosystems, and healthier communities.

Why is this news significant?

India’s absence at BelĂ©m stands out because for the first time a global platform is drafting a climate-health action plan. While India has often been viewed through the prism of its energy transition challenges, this moment presented a chance to highlight its homegrown welfare successes with global resonance. The paradox is striking: even without designing policies as “climate policies,” India has reaped climate-health co-benefits, unlike many countries still struggling to integrate the two. Yet, persistent failures like high LPG refill costs in PMUY and siloed governance highlight the scale of unfinished work.

What is the Belém Health Action Plan (BHAP)?

  • The BHAP is a strategic framework being finalized ahead of COP30 (Nov 2025, BelĂ©m, Brazil) intended to integrate health into climate change adaptation.
  • It emphasizes health equity, climate justice, and social participation alongside strengthening health systems to be resilient in face of climate change.

Key Features / Action Lines

Some of its priority action lines include:

  • Surveillance & Monitoring:
    • Linking climate/environmental data with health surveillance, early warning systems (for heatwaves, epidemics, etc.).
    • Real-time data, local / community-level monitoring.
  • Evidence-Based Policy Strategy & Capacity Building:
    • Training health workforce, integrating mental health & psychosocial support measures.
    • Gender-responsive, inclusive policies, recognizing most vulnerable groups (women, Indigenous people, persons with disabilities).
  • Innovation & Production:
    • Resilient infrastructure and services (e.g. climate-adapted health facilities), sustainable supply chains.
    • Focus on blended financing and mobilizing investments to make health systems adaptive and equitable.
  • Cross-cutting priorities:
    • Health equity & climate justice: ensuring that adaptation efforts do not further marginalize vulnerable groups.
    • Leadership & governance: accountability, social participation from civil society, clear institutional roles.

What lessons do India’s welfare programmes offer for climate-health synergy?

  1. PM POSHAN: Covers 11 crore children in 11 lakh schools, linking nutrition, agriculture, and education. Promotion of millets strengthens climate-resilient food systems.
  2. Swachh Bharat Abhiyan: Improved sanitation, public health, and environmental sustainability, while embedding dignity and cultural symbolism via Gandhi’s vision.
  3. MNREGA: Enhanced livelihood security while simultaneously restoring degraded ecosystems through water conservation and afforestation.
  4. PM Ujjwala Yojana (PMUY): Transition to clean cooking fuel cut household air pollution — a leading cause of respiratory illness — while reducing carbon emissions.

How has leadership and community engagement shaped outcomes?

  1. Political leadership: Direct involvement of the Prime Minister gave Swachh Bharat and PMUY inter-ministerial traction and public legitimacy.
  2. Community engagement: PM POSHAN leveraged parent-teacher committees, Swachh Bharat invoked cultural pride in cleanliness, ensuring local ownership.
  3. Cultural anchoring: Climate action framed as health protection resonates more deeply than carbon metrics.

What structural challenges persist in implementation?

  1. Administrative silos: Divergent sectoral mandates limit integrated outcomes.
  2. High refill costs in PMUY: Oil marketing interests often outweigh beneficiary affordability.
  3. Social barriers: Gender norms and cultural practices limit uptake of clean fuel and sanitation.
  4. Output vs. outcome gap: Programmes measure immediate coverage but not long-term health-climate impact.

What framework does India’s experience suggest for climate-health governance?

  1. Strategic prioritisation: Frame climate action as immediate health security, not distant environmental risk.
  2. Procedural integration: Embed health impact assessments into energy, transport, and urban policies.
  3. Participatory implementation: Leverage ASHA workers, SHGs, Panchayats as health-climate advocates.

Why is this vision critical for the future?

  1. High stakes: Delinking climate and health crises leads to fragmented solutions with escalating costs.
  2. Transformative potential: An intersectoral, whole-of-society approach could position India as a global leader in climate-health governance.
  3. Clear choice: Continue piecemeal efforts or pioneer a bold model aligning welfare with planetary health.

Conclusion

India’s welfare architecture has shown that policies designed for social welfare can unintentionally become climate-health interventions. The challenge now is to make this synergy intentional and institutionalised, with robust political framing, procedural integration, and community mobilisation. At a time when the world is drafting a global climate-health action plan, India’s absence from the table is a wake-up call: to convert scattered lessons into a coherent model of governance that others can emulate.

Value Addition

Key Concepts

  1. Climate-Health Nexus: Environmental policies often have unintended health impacts; health policies also influence climate outcomes.
  2. Co-Benefits Approach: One intervention (e.g., PMUY for clean cooking fuel) yields multiple dividends (better health, women’s empowerment, reduced emissions).
  3. Whole-of-Society Approach: Intersectoral coordination between ministries, communities, and local bodies ensures impact.
  4. Output vs Outcome Gap: Many Indian schemes achieve outputs (LPG connections, toilets built) but outcomes (sustained use, cleaner air, health equity) remain weak.

Important Data / Reports

  1. WHO Report (2021): Air pollution causes 7 million premature deaths annually worldwide.
  2. Lancet Countdown on Health and Climate Change (2022): South Asia faces one of the highest global burdens of climate-related health risks.
  3. India’s National Family Health Survey (NFHS-5, 2021): Despite welfare schemes, 35.5% of children under 5 are stunted and 32.1% are underweight, showing links between nutrition, climate resilience, and health.
  4. UNDP (2023): Every $1 invested in resilience and adaptation yields $4 in avoided losses.
  5. Global Conference on Climate & Health (Belém Plan, 2025): First global blueprint on climate-health integration.

PYQ Linkage:

[UPSC 2017] ‘Climate Change’ is a global problem. How India will be affected by climate change? How Himalayan and coastal states of India will be affected by climate change?

Linkage: India’s welfare schemes like PM POSHAN, PMUY, Swachh Bharat and MNREGA demonstrate that non-health interventions can mitigate climate impacts while improving public health. The Himalayan and coastal states, most vulnerable to warming, floods, and sea-level rise, can benefit from such intersectoral, resilience-building models. Thus, India’s climate-health vision provides practical pathways to address both regional vulnerabilities and national climate commitments.

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Foreign Policy Watch: India-Nepal

Turmoil, tragedy, and tenacity in Nepal

Introduction

In early September 2025, Nepal was rocked by its most intense youth uprising since the end of monarchy in 2008. Peaceful demonstrations against corruption and inequality, largely organised online, escalated into violent clashes, leaving 73 dead and vital government institutions in flames. The resignation of Oli and the appointment of Sushila Karki as interim Prime Minister has opened a critical transition. The protests underscore the growing role of Gen Z digital activism in reshaping political landscapes.

Timeline of the protests

  1. 4 Sept 2025: Government orders registration/ban of 26 social media platforms (trigger).
  2. Early Sept (pre-8): Weeks of online organising; #NepoBabies and related trends circulate.
  3. 8 Sept 2025 (Day 1): Large peaceful gatherings at Maitighar Mandala; clashes erupt; official reports of first deaths (≈19 reported that night).
  4. 9 Sept 2025 (Day 2): Violence spreads; Parliament, Supreme Court, Singha Durbar attacked and some set on fire; casualty and injury figures climb.
  5. 10–12 Sept 2025: Army deployed to secure cities; Home Minister and Oli resign; negotiations with youth representatives begin.
  6. 12–14 Sept 2025: Sushila Karki sworn in as interim prime minister; Parliament dissolved; elections scheduled for March (caretaker mandate announced).

How did legal restraints on digital space ignite a national revolt?

  1. Trigger — Social Media Ban: On 4 September 2025, the government ordered the blocking/registration of 26 social media platforms, including X, Facebook, and Instagram.
  2. Impact: This cut off Gen-Z’s primary space for organisation, expression, and economic activity, seen as a direct assault on civic freedom.
  3. Outcome: Scattered anger was transformed into coordinated protests.
  4. Example: Youth groups used Discord and TikTok to plan assemblies at Maitighar Mandala and coordinate marches towards Parliament.

What were the structural grievances behind the uprising?

  1. Corruption & Elitism: Perceptions of elite capture, misuse of resources, and impunity fuelled resentment.
  2. Symbol of Rage: The #NepoKids / #NepoBabies campaign exposed politicians’ children flaunting luxury while ordinary youth faced precarity.
  3. Example: Viral clips contrasting lavish lifestyles with student unemployment intensified outrage.
  4. Data: Transparency International (2025): Nepal ranked 107/180 on the Corruption Perceptions Index (CPI score: 34).

Why did peaceful protests become deadly and destructive?

  1. Escalation: Initially peaceful gatherings on 8 September were dispersed using tear gas and reportedly live ammunition.
  2. Violence: Retaliatory riots followed; demonstrators targeted symbols of state power.
  3. Example: On 9 September, Parliament, Supreme Court, and Singha Durbar were set ablaze; crucial judicial records were damaged.
  4. Data: 72–73 deaths reported, with hundreds injured, mostly between ages 19–24.

What immediate political fallout followed the unrest?

  1. Leadership Change: Home Minister resigned on 8 Sept; PM K.P. Sharma Oli stepped down on 9 Sept.
  2. Caretaker Transition: The Army mediated negotiations; Parliament was dissolved.
  3. Interim PM: Sushila Karki, former Chief Justice, sworn in on 12 Sept 2025, mandated to hold elections within six months.
    • Karki visited hospitals, assured investigations, and pledged accountability and timely polls.

How did digital tools shape both mobilisation and misinformation?

  1. Mobilisation: Platforms like Discord, TikTok, and hashtags enabled rapid outreach, meme-culture, and youth identity in protests.
  2. Creativity: Anime/manga flags and viral videos energised Gen-Z demonstrations.
  3. Misinformation: False reports and AI-generated images (e.g., Pashupati Temple “burning”) created panic and confusion.
  4. Example: Fake claims about a senior politician’s family being killed circulated widely before being disproved.

What are the main challenges facing Nepal’s interim rulers?

  1. Legitimacy Concerns: Traditional political parties, deposed MPs, and royalist factions question the constitutional mandate of the interim set-up.
  2. Balancing Act: The government must address youth expectations of anti-corruption and inclusivity while ensuring political buy-in from entrenched elites.
  3. Stability: Conducting free and fair elections by March 2026 without undermining the democratic spirit of Gen-Z protests remains the foremost task.
  4. Example: Political parties and royalists have already raised doubts over Karki’s legitimacy despite broad youth support.

Implications for Nepal (domestic)

  • Political Legitimacy and Party Renewal
    • The protests revealed a deep erosion of trust in established parties.
    • Unless political parties reform and integrate youth aspirations into institutional politics, cycles of protest could continue.
    • Revamping youth wings and embracing inclusivity may be crucial for long-term stability.
    • (Echoes analysts’ calls for parties to redefine themselves in light of 1990 and 2006 lessons.)
  • Rule of Law and Accountability
    • Strong demands exist for independent investigations into the use of excessive force and arson during protests.
    • The credibility of Nepal’s democracy depends on whether security forces and political elites are held accountable.
    • Sushila Karki’s pledge to investigate abuses and compensate victims sets both a legal and moral benchmark.
  • Economic and Social Policy Pressure
    • With youth unemployment at 20%, migration pressures, and widening inequality, socio-economic grievances remain central.
    • The interim government faces urgent pressure to deliver short-term relief (jobs, anti-corruption crackdowns) while laying the groundwork for structural reforms in education, employment, and inclusivity.
    • Failure to deliver may reignite unrest and deepen distrust in democratic institutions.

Implications for South Asia (regional)

  • Contagion Risk and Inspiration:
    • The Nepali uprising reflects a wider Gen-Z dissent pattern in Asia.
    • Similar youth-led movements in Sri Lanka (2022), Bangladesh, Indonesia, Philippines have challenged entrenched elites.
    • Nepal’s protests may inspire emulation across borders, intensifying regional instability.
  • Cross-Border Diplomacy & Stability:
    • Political turbulence in Kathmandu could strain bilateral relations with neighbours.
    • Instability may disrupt migration flows, remittances, and border trade.
    • Governments in South Asia may reassess youth policy, unemployment measures, and digital freedoms to preempt unrest.
  • Policy Lessons on Digital Platforms:
    • Nepal’s ban highlights the risks of hard regulation of social media.
    • Neighbouring states will closely observe whether bans quell dissent or provoke backlash.
    • The episode may shape future regional digital governance frameworks balancing free expression with misinformation control.

Conclusion

Nepal’s Gen Z uprising is both tragic and transformative. It highlights the power of digital natives to hold governments accountable, but also the dangers of violence and misinformation. The coming months will test whether Nepal can channel this energy into transparent, inclusive governance or relapse into instability.

PYQ Linkage:

[UPSC 2012] Discuss the contentious issues that have caused the prolonged

constitutional logjam in Nepal.

Linkage: The 2025 Gen Z protests in Nepal show that unresolved constitutional questions of inclusiveness, accountability, and representation remain central even after the 2015 Constitution. The uprising exposed youth anger at elite capture and exclusion of caste, ethnic, and gender groups — echoing the very fault lines that prolonged Nepal’s constitutional logjam post-2008 monarchy abolition. Thus, the recent turmoil is a continuation of the older struggle for a truly inclusive and accountable Nepali state.

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Supreme Court cites Preamble to reject a plea

Why in the News?

The Supreme Court rejected a plea against a religious leader inaugurating Mysuru Dasara, reminding that the Preamble upholds secularism, liberty, equality, and fraternity as core ideals of unity.

Backgrounder:

  • The Karnataka government invited Banu Mushtaq, 2025 International Booker Prize winner, to inaugurate Mysuru Dasara Festival and perform the pooja.
  • A 2023 video resurfaced where she questioned the worship of Goddess Bhuvaneshwari, sparking controversy.
  • BJP and others opposed the invite, for her selective criticism of Hindu rituals and demanded withdrawal of the invite sent to her.

Supreme Court’s Observations:

  • Secular Character: The Court reminded that the Preamble enshrines secularism, liberty, equality, and fraternity as unifying ideals.
  • State’s Neutrality: Dasara inauguration was a State event, not a private ritual. The State “maintains no religion of its own” (echoing M. Ismail Faruqui, 1994).
  • Key Precedents Recalled:
    • Kesavananda Bharati (1973) & S.R. Bommai (1994): Secularism = basic feature of the Constitution.
    • R.C. Poudyal (1994): Even before “secular” was inserted (42nd Amendment, 1976), the Constitution upheld equal treatment of all faiths.
    • Dr. Balram Singh v. UOI (2024): State can intervene to curb religious practices impeding equality & development.

Preamble

About the Preamble:

  • Nature: Introductory statement; reflects philosophy, vision, and objectives.
  • Origin: Based on Objectives Resolution (Nehru, 1946); adopted 1947.
  • Declarations: India as Sovereign, Socialist, Secular, Democratic, Republic ensuring Justice, Liberty, Equality, Fraternity.
  • Symbolism:

    1. Source of Authority: “We, the People of India.”
    2. Nature of State: Sovereign, Socialist, Secular, Democratic, Republic.

Amendment of the Preamble:

  • Permissible: Supreme Court (Kesavananda Bharati, 1973) has held that Preamble is part of Constitution and can be amended without violating Basic Structure.
  • Only Amendment: 42nd Constitutional Amendment Act, 1976 (during Emergency).
    • Added “Socialist” and “Secular” between Sovereign and Democratic.
    • Added “Integrity” to Unity of the Nation.

Key Judicial Pronouncements:

  • Berubari Union Case (1960): Preamble not a part of the Constitution; only a tool for interpretation.
  • Kesavananda Bharati Case (1973): Overruled Berubari; Preamble is part of the Constitution, embodies basic structure but cannot override provisions.
  • S.R. Bommai Case (1994): Secularism upheld as basic feature of the Constitution.
  • LIC of India Case (1995): Reaffirmed Preamble as integral, but non-justiciable (not enforceable in court).
[UPSC 2020] The Preamble to the Constitution of India is:

Options: (a) a part of the Constitution but has no legal effect

(b) not a part of the Constitution and has no legal effect either

(c) part of the Constitution and has the same legal effect as any other part

(d) a part of the Constitution but has no legal effect independently of other parts*

 

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Electoral Reforms In India

Registered Unrecognised Political Parties (RUPP)

Why in the News?

The Election Commission de-listed 474 Registered Unrecognised Political Parties (RUPP) for not contesting polls in six years, as part of its electoral clean-up drive.

Delisting of Political Parties:

  • ECI’s Powers: Governed by Section 29A, RP Act, 1951.
    • No explicit power with ECI to de-register a party once registered, except for fraud or anti-Constitutional allegiance.
  • Judicial Interpretation:
    • INC vs Institute of Social Welfare (2002): SC ruled that ECI cannot de-register parties, only delist or declare inactive, which removes privileges but NOT their legal entity.

About Registered Unrecognised Political Parties (RUPPs):

  • Constitutional Right: Right to form political associations is guaranteed under Article 19(1)(c).
  • Registration: RUPPs are political associations registered with the Election Commission of India (ECI) under Section 29A, Representation of the People Act, 1951.
  • Not recognised: As either State or National parties because they have not secured the required vote share or seats in past elections.
  • Privileges & Benefits:
    • Tax exemption under Section 13A, Income Tax Act, 1961.
    • Eligibility for common poll symbols during elections (under Symbols Order, 1968).
    • Can nominate up to 20 star campaigners.
  • Obligations:
    • Must contest elections periodically.
    • File annual audit accounts and contribution reports.
    • Disclose donations above â‚č20,000.
    • Ensure no donations above â‚č2,000 are taken in cash.
  • Issues: Many RUPPs exploit privileges without contesting elections, crowding out genuine contesting parties and confusing voters.

What are Recognised Political Parties?

  • Types: Recognised parties are classified as National Parties or State Parties.
  • Privileges:
    • Exclusive reserved symbols.
    • Free copies of electoral rolls.
    • Broadcasting time on Doordarshan/All India Radio.
    • Consultation rights with ECI in election matters.
  • Recognition depends on vote share or seats won in Lok Sabha/Assembly elections.

Conditions for Recognition:

National Party State Party
Secures 6% of valid votes in Lok Sabha/Assembly elections in any 4 or more states + wins 4 Lok Sabha seats. Secures 6% of valid votes in the state Assembly election + wins 2 Assembly seats.
Wins 2% of Lok Sabha seats (currently 11 seats) from at least 3 states. Secures 6% of valid votes in the state’s Lok Sabha election + wins 1 Lok Sabha seat.
Recognised as a State Party in 4 or more states. Wins 3% of Assembly seats or 3 seats (whichever is higher) in the state Assembly.
— Wins 1 Lok Sabha seat for every 25 seats allotted to that state.
— Secures 8% of total valid votes in the state’s Assembly or Lok Sabha election (added in 2011).

 

[UPSC 2001] Consider the following statements regarding the political parties in India:

1. The Representation of the People Act, 1951 provides for the registration of political parties.

2. Registration of political parties is carried out by the Election Commission.

3. A national level political party is one which is recognised in four or more States.

4. During the 1999 general elections, there were six National and 48 State level parties recognised by the Election Commission.

Options: (a) I, II and IV (b) I and III (c) II and IV (d) I, II, III and IV*

 

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ISRO Missions and Discoveries

Gaganyaan Analog Experiments (Gyanex)

Why in the News?

Gyanex (Gaganyaan Analog Experiments) ground-based astronaut simulations are being conducted by ISRO with ICMR and Institute of Aerospace Medicine, Bengaluru, to prepare Indian astronauts for the 2027 Gaganyaan mission.

What are Gaganyaan Analog Experiments (Gyanex)?

  • Purpose: India’s first systematic programme in space medicine and astronaut psychology, preparing protocols for Gaganyaan and future missions like space stations and lunar expeditions.
  • Setup: Conducted at the Institute of Aerospace Medicine, Bengaluru, with ICMR support. Astronauts and defence personnel live in a mock spacecraft simulator under confinement, consuming DRDO-developed space food.
  • Activities: Strict space-like routines involving scientific experiments, resource management, schedules, and limited supplies. Tests also cover communication with time-delay simulation.
  • Gyanex-1: Group Captain Angad Pratap and two others confined for 10 days; completed 11 experiments on psychology, biomedicine, and communications.
  • Microgravity Simulation: Weightlessness cannot be reproduced on Earth; instead, 7-day bed-confinement at 6° head tilt studied microgravity effects.
  • Other Indian Analog Missions:
    • Ladakh Human Analog Mission (Nov 2024): Simulated interplanetary survival in cold, barren terrain.
    • HOPE Habitat at Tso Kar (Aug 2025): Tested 8 m habitat + 5 m utility module in Mars-like conditions of low pressure, saline permafrost, and high UV radiation.

About Gaganyaan Mission:

  • Overview: India’s first human spaceflight mission, initiated in 2007, to send 3 astronauts into Low Earth Orbit (400 km) for 3 days, followed by Arabian Sea splashdown.
  • Rocket: Human-Rated LVM3 (HLVM3), adapted from GSLV Mk3, certified in 2025 for safe human use.
  • Significance: India to become the 4th nation (after US, Russia, China) with crewed spaceflight capability.
  • Latest Timeline (as of Sept 2025):
    • Dec 2025: First uncrewed mission (G1) with humanoid Vyommitra.
    • 2026: Two more uncrewed flights for life-support, avionics, and escape tests.
    • Early 2027: First crewed mission – 3 astronauts in orbit for 3 days.
  • Progress so far:
    • 80–85% development complete: avionics, parachutes, crew safety systems validated.
    • Integrated Air Drop Test (Aug 2025): Confirmed crew module deceleration.
    • Crew Escape System: Multiple ground and flight tests successful.
    • Recovery: Indian Navy and Australian Space Agency conducting splashdown drills.
    • Four IAF test pilots shortlisted: Shubhanshu Shukla, Prasanth Balakrishnan Nair, Angad Pratap, Ajit Krishnan.
    • All trained in Russia, now in advanced Indian training. Final crew of three will be chosen for maiden flight.
[UPSC 2016] Consider the following statements: The Mangalyaan launched by ISRO

1. is also called the Mars Orbiter Mission

2. made India the second country to have a spacecraft orbit the Mars after USA

3. made India the only country to be successful in making its spacecraft orbit the Mars in its first attempt.

Select the correct answer using the code given below:

Options: (a) 1 only (b) 2 and 3 only (c) 1 and 3 only * (d) 1, 2 and 3

 

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Water Management – Institutional Reforms, Conservation Efforts, etc.

Ecological Impact of the ELSA 3 Shipwreck in the Arabian Sea

Why in the News?

The sinking of the ELSA 3 ship off the Kerala coast in May led to a significant ecological disruption in the south-eastern Arabian Sea, a new study has confirmed.

Ecological Impact of the ELSA 3 Shipwreck in the Arabian Sea

About the Pollution and Contaminants:

  • Oil Slick: Wreck of ELSA 3 released petroleum pollutants, initially forming a slick of about 2 square miles.
  • Polyaromatic Hydrocarbons (PAHs): Compounds like naphthalene, fluorene, anthracene, phenanthrene, fluoranthene, pyrene detected; toxic, carcinogenic, and bioaccumulative.
  • Naphthalene Marker: High levels confirmed continuous leakage from fuel tanks.
  • Trace Metals: Nickel, lead, copper, vanadium found in elevated levels in water and sediments, worsening toxicity.
  • Distribution: Oil spread shifted with sea turbulence—first mid-depth concentration, later visible on the surface.

Ecological Impacts of the Oil Spill:

  • Plankton: Zooplankton showed pollutant accumulation, marking entry into the marine food chain.
  • Fish Eggs & Larvae: Collected in the southwest monsoon spawning season displayed decay and mortality, threatening commercial species recruitment.
  • Benthic Organisms: Sensitive species declined within days; only pollution-tolerant worms and bivalves survived, reflecting seabed stress.
  • Higher Fauna: Brown Noddy seabird (Anous stolidus) recorded with oil-soaked plumage, highlighting risks to birds and larger marine life.
  • Overall Effect: A multi-level disruption from plankton to fish stocks to seabirds.

Microbial Response and Bioremediation:

  • Bacterial Diversity: Metagenomic studies found hydrocarbon-degrading bacteria near the wreck.
  • Key Strains: Neptunomonas acidivorans, Halomonas tabrizica, Acinetobacter baumannii detected.
  • Implications: Their presence reflects both severe contamination and natural bioremediation potential.
  • Outlook: Microbial action may reduce pollution gradually, but contamination in the Arabian Sea remains significant.
[UPSC 2017] In the context of solving pollution problems what is/are the advantage/disadvantages of bioremediation technique?

1. It is a technique for cleaning up pollution by enhancing the same biodegradation process that occurs in nature.

2. Any contaminant with heavy metals such as cadmium and lead can be readily and completely treated by bioremediation using microorganisms.

3. Genetic engineering can be used to create microorganisms specifically designed for bioremediation.

Select the correct answer using the code given below:

Options: (a) 1 only, (b) 2 and 3 only, (c) 1 and 3 only* (d) 1, 2 and 3

 

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Food Procurement and Distribution – PDS & NFSA, Shanta Kumar Committee, FCI restructuring, Buffer stock, etc.

[19th Septmeber 2025] The Hindu Op-ed: Equalising Primary Food Consumption in India

PYQ Relevance

[UPSC 2019] What are the reformative steps taken by the Government to make food grain distribution system more effective?

Linkage: The article’s proposal to restructure the PDS by trimming excess cereal entitlements and expanding pulse distribution directly links with UPSC 2019’s question. It highlights how reformative steps—like targeted subsidies, rationalised stocking by FCI, and focus on nutritional security beyond cereals—can make the food grain distribution system more effective. Thus, it connects poverty reduction with sustainable and equitable food security reforms.

Mentor’s Comment

The recent NSS household consumption survey, coupled with World Bank estimates, has painted a contrasting picture of India’s poverty and food deprivation. While global narratives celebrate the near-eradication of extreme poverty, ground-level consumption data tells a more sobering story, half of rural India still struggles to afford two simple thalis a day. This article unpacks the deeper meaning of food security beyond calorie intake, critiques the existing Public Distribution System (PDS), and explores how restructuring subsidies, especially towards pulses, can equalise food consumption in India. For UPSC aspirants, the debate is not only about statistics but also about welfare priorities, distributional justice, and the role of the state in ensuring dignified living standards.

Introduction

India has long battled poverty and hunger, but the release of the 2024 NSS Household Consumption Survey and the World Bank’s Poverty and Equity Brief (2025) has reshaped the debate. The World Bank report claims that extreme poverty has fallen from 16.2% in 2011-12 to just 2.3% in 2022-23, a historic achievement if true. Yet, when food consumption is measured through the “thali index” rather than calorie-based poverty lines, stark disparities emerge: 50% of rural India and 20% of urban India could not afford two thalis a day in 2023-24. This contradiction raises a crucial policy question—how can India ensure not just calorie intake but nutritional adequacy and equal access to primary food consumption?

The contrasting narratives of poverty in India

  1. World Bank Estimate: Extreme poverty has “virtually disappeared,” with only 2.3% living below $2.15/day.
  2. Thali Index Reality: Despite rising incomes, half of rural India could not afford two balanced meals (thalis) daily in 2023-24.
  3. Deprivation Gap: The difference arises because food is residual expenditure after households spend on essentials like rent, health, and transport.

Why measure poverty through the thali meal?

  1. Beyond Calories: Traditional poverty lines only measure calorific intake, ignoring nutrition and satisfaction.
  2. Balanced Meal: A thali (rice, dal, roti, vegetables, curd, salad) represents a self-contained, nutritious unit of food consumption.
  3. Cost Factor: Crisil estimates a home-cooked thali costs â‚č30. Many households fall short of affording even two thalis/day per person.

How effective is the Public Distribution System?

  1. Food Deprivation with PDS: Even after including PDS food supplies, deprivation persists—40% rural and 10% urban cannot afford two thalis daily.
  2. Subsidy Distribution: In rural India, a person in the 90–95% expenditure class receives 88% of the subsidy given to the poorest 5%, despite much higher consumption capacity.
  3. Urban Progressivity: The PDS is more progressive in urban areas, but still, 80% receive subsidised or free food, including those not in need.

Why are cereals not enough

  1. Equalised Cereal Consumption: Both the poorest and richest consume similar amounts of rice and wheat, showing PDS success but also its limits.
  2. Expenditure Share: Cereals now account for only 10% of average household expenditure, so increasing cereal subsidy has diminishing returns.
  3. Need for Protein: Pulses consumption is half in the poorest 5% compared to the richest 5%, highlighting protein inequality.

Policy path: Equalising food consumption through pulses

  1. Expand PDS Coverage: Redirect subsidies towards pulses, the main protein source for many Indians.
  2. Rationalise Cereals Subsidy: Trim excess rice/wheat entitlements, especially for better-off groups, reducing stocking costs for FCI.
  3. Compact and Targeted PDS: By focusing on pulses and eliminating subsidies beyond the “two thali/day” norm, the system becomes both cost-effective and equitable.
  4. Global Significance: Achieving equalised food consumption across social classes would be a unique welfare success story worldwide.

Conclusion

The thali index reveals a hidden crisis of food deprivation that headline poverty numbers obscure. While cereal consumption has been equalised through decades of PDS efforts, the next frontier lies in ensuring protein security via pulses distribution. Rationalising subsidies and targeting them effectively can not only optimise public spending but also equalise primary food consumption across India, a feat that would stand as a benchmark in global welfare policy.

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Artificial Intelligence (AI) Breakthrough

How the DeepSeek-R1 AI model was taught to teach itself to reason

Introduction

Reasoning, the ability to reflect, verify, self-correct, and adapt, has historically been considered uniquely human. From mathematics to moral decision-making, reasoning shapes every facet of human civilisation. Large language models (LLMs) like GPT-4 have shown glimpses of reasoning, but these were achieved with human-provided examples, introducing cost, bias, and limits. In September 2024, researchers at DeepSeek unveiled their model R1, which demonstrated reasoning through reinforcement learning (trial and error with rewards), without supervised fine-tuning. This represents a paradigm shift in how machines may learn, reason, and potentially evolve intelligence.

Why is DeepSeek-R1 in the News?

For the first time, an AI model has taught itself to reason without human-crafted examples. The results were dramatic: DeepSeek-R1 improved from 15.6% to 86.7% accuracy in solving American Invitational Mathematics Examination (AIME) problems, even surpassing the average performance of top human students. It also demonstrated reflection (“wait
 let’s try again”) and verification—human-like traits of reasoning. The scale and quality of progress mark this as a milestone in AI research, contrasting sharply with traditional methods that heavily relied on human-labelled data.

What is Reinforcement Learning in AI?

  1. Definition: Reinforcement learning (RL) is a trial-and-error method where a system receives rewards for correct answers and penalties for wrong ones.
  2. DeepSeek’s Application: Instead of providing reasoning steps, the model was only rewarded for correct final answers.
  3. Outcome: Over time, R1 developed reflective chains of reasoning, dynamically adjusting “thinking time” based on task complexity.

How Did DeepSeek-R1 Achieve Self-Reasoning?

  1. R1-Zero Phase: Started with solving maths/coding problems, producing reasoning inside <think> tags and answers in <answer> tags.
  2. Trial-and-Error Learning: Wrong reasoning paths were discouraged, correct ones reinforced.
  3. Emergence of Reflection: Model started using “wait” or “let’s try again,” indicating self-correction.

What Were the Major Successes?

  1. Mathematical Benchmarks: R1-Zero improved from 15.6% to 77.9%, and with fine-tuning, to 86.7% on AIME.
  2. General Knowledge & Instruction Following: 25% improvement on AlpacaEval 2.0 and 17% on Arena-Hard.
  3. Efficiency: Adaptive thinking chains—shorter for easy tasks, longer for difficult ones—conserving computational resources.
  4. Alignment: Improved readability, language consistency, and safety.

What Are the Limitations and Risks

  1. High Energy Costs: Reinforcement learning is computationally expensive.
  2. Human Role Not Fully Eliminated: Open-ended tasks (e.g., writing) still require human-labelled data for reward models.
  3. Ethical Concerns: Ability to “reflect” raises risks of generating manipulative or unsafe content.
  4. Need for Stronger Safeguards: As AI reasoning grows, so does the risk of misuse.

Why Does this Matter for the Future of AI?

  1. Reduces Dependence on Human Labour: Cuts costs and addresses exploitative conditions in data annotation.
  2. Potential for Creativity: If reasoning can emerge from incentives, could creativity and understanding follow?
  3. Shift in AI Training Paradigm: From “learning by example” to “learning by exploration.”
  4. Global Implications: Impacts education, coding, mathematics, governance, and ethics of AI.

Conclusion

DeepSeek-R1 marks a turning point in AI evolution. By demonstrating reasoning through reinforcement learning alone, it challenges the notion that human-labelled data is indispensable. Yet, this very capability opens new debates—about creativity, autonomy, and control. For policymakers and citizens alike, the task is to harness AI’s promise while ensuring safety, fairness, and ethical integrity.

PYQ Relevance:

[UPSC 2023] Introduce the concept of Artificial Intelligence (AI). How does Al help clinical diagnosis? Do you perceive any threat to privacy of the individual in the use of Al in healthcare?

Linkage: The breakthrough of DeepSeek-R1 shows how AI can now reason through reinforcement learning without human-labelled data, making it more efficient and adaptive. Such reasoning ability can enhance clinical diagnosis by enabling AI to self-correct and refine decision-making in complex medical cases. However, as with healthcare AI generally, the privacy threat persists if sensitive patient data is fed into models without strong safeguards.

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