💥Join UPSC 2027,2028 Mentorship (August Batch) + XFactor Notes & Microthemes PDF

GS Paper: GS3

  • Rise in Mugger Crocodile Population in Similipal National Park

    Why in the News?

    Similipal National Park in Odisha recorded an increase in its mugger crocodile population to 84 during a three day census in 2026, reversing a declining trend observed in recent years.

    About Similipal National Park

    • A National Park, Tiger Reserve, and Biosphere Reserve
    • Forms part of the Mayurbhanj Elephant Reserve
    • Included in the UNESCO World Network of Biosphere Reserves since 2009
    • Among India’s most biodiverse protected landscapes

    Location

    • Situated in Mayurbhanj district, northern Odisha
    • Lies within the Eastern Ghats
    • Area of about 2,750 sq km
    • One of the largest tiger reserves in India

    Mugger Crocodile Census and Conservation

    Census Findings

    • 2026 census recorded 84 mugger crocodiles
    • Increase from 81 individuals in 2025
    • West Deo River alone hosts about 60 crocodiles
    • Indicates stabilisation and early recovery of the species

    Conservation Efforts

    • Mugger Crocodile (Crocodylus palustris) is listed as Vulnerable on the IUCN Red List
    • Recovery attributed to the Ramtirtha Mugger Crocodile Breeding Centre
    • Centre releases hatchlings annually into Similipal rivers
    • Focus on
      • Habitat protection
      • Scientific monitoring
      • Assisted population reinforcement
    [2011] Two important rivers — one with its source in Jharkhand (and known by a different name in Odisha), and another, with its source in Odisha — merge at a place only a short distance from the coast of Bay of Bengal before flowing into the sea. This is an important site of wildlife and biodiversity and a protected area. Which one of the following could be this? 

    (a) Bhitarkanika 

    (b) Chandipur-on-sea 

    (c) Gopalpur-on-sea 

    (d) Simlipal

  • What is futuristic marine and space biotechnology

    Why in the News?

    India is exploring marine and space biotechnology to reduce dependence on imported bio-resources and better use extreme ecosystems. Despite having over 11,000 km of coastline and an Exclusive Economic Zone of more than 2 million sq km, domestic output remains limited, with seaweed production at around 70,000 tonnes annually. India still imports agar, carrageenan, and alginates, even though these can be produced locally. Initiatives such as the Deep Ocean Mission signal a shift from conventional coastal extraction to technology-driven biomanufacturing by linking marine biology with space research.

    What is Marine Biotechnology and Why is it Strategic?

    1. Definition: Studies marine microorganisms, algae, and animals to extract enzymes, bioactive compounds, biomaterials, and biostimulants.
    2. Industrial relevance: Supports production of food ingredients, pharmaceuticals, cosmetics, chemicals, and biofuels.
    3. Adaptive advantage: Marine organisms evolve under high pressure, low light, salinity, and low oxygen, producing novel biochemical pathways.
    4. Strategic gap: India imports seaweed-based inputs despite possessing rich marine biodiversity.

    What is Space Biotechnology and How is it Distinct?

    1. Definition: Examines biological processes under microgravity and radiation conditions.
    2. Research focus: Studies microbial behaviour, plant growth, human metabolism, and cellular regeneration in space.
    3. Industrial application: Enables advances in drug discovery, human health management, life-support systems, and bio-manufacturing in extreme environments.
    4. Institutional role: ISRO conducts microgravity experiments on microbes, algae, and biological systems.

    Why Does India Need Futuristic Marine and Space Biotechnology?

    1. Resource underutilisation: Vast EEZ remains biologically rich but economically underexploited.
    2. Import dependence: Relies on foreign suppliers for marine bio-compounds used in food and pharma.
    3. Biomanufacturing ambition: Supports transition from raw biomass extraction to value-added bio-industries.
    4. Sustainability imperative: Reduces pressure on terrestrial resources and supports circular bioeconomy.

    Where Does India Stand Today?

    1. Marine biomass production: Seaweed cultivation remains limited at ~70,000 tonnes annually.
    2. Policy push: Deep Ocean Mission supports exploration and sustainable use of deep-sea bioresources.
    3. Institutional ecosystem: ICAR-Central Marine Fisheries Research Institute and state initiatives (e.g., Gujarat) promote seaweed cultivation and marine bio-products.
    4. Space research: ISRO integrates biotechnology experiments into space missions.

    How Does Convergence of Marine and Space Biotechnology Create Value?

    1. Extreme biology: Enables understanding of life under pressure, radiation, and nutrient stress.
    2. Innovation pathway: Facilitates discovery of new enzymes, stress-resistant microbes, and regenerative mechanisms.
    3. Industrial scalability: Supports next-generation bioreactors, biofuels, and medical applications.
    4. Strategic positioning: Aligns India with global bioeconomy and frontier science trends.

    Conclusion

    Futuristic marine and space biotechnology offers India a technology-led pathway to convert ecological abundance into economic and strategic advantage. By integrating deep-sea exploration with space-based biological research, India can reduce import dependence, strengthen biomanufacturing capacity, and emerge as a global hub for bio-based industries, while ensuring sustainability and scientific leadership.

    PYQ Relevance

    [UPSC 2018] Why is there so much activity in the field of biotechnology in our country? How has this activity benefitted the field of biopharma?

    Linkage: India is expanding biotechnology into marine and space environments to access new biological resources. This supports biopharma growth, import substitution, and high-value biomanufacturing under GS-III.

  • PFRDA forms high-level committee for assured payouts under NPS

    Why in the news?

    The Pension Fund Regulatory and Development Authority (PFRDA) has constituted a high-level committee to frame guidelines and regulations for assured pension payouts under the National Pension System (NPS), aimed at strengthening retirement income security.

    About the committee

    • Chairperson: Dr. M. S. Sahoo, Former Chairperson, Insolvency and Bankruptcy Board of India (IBBI)
    • Composition: 15 members from legal, actuarial, finance, insurance, capital markets and academia
    • Flexibility: Power to invite external experts and intermediaries as special invitees
    • Nature: Standing advisory committee on structured pension payouts

    Key objectives and terms of reference

    • Assured payout framework: Draft regulations for assured and structured pension payouts, based on PFRDA consultation paper dated 30 September 2025
    • Seamless transition: Smooth shift from accumulation phase to decumulation payout phase
    • Market based assurance: Explore novation and settlement mechanisms for legally enforceable guarantees
    • Operational design: Define lock in period, withdrawal limits, pricing mechanisms and fee structures
    • Risk and legal oversight: Specify capital and solvency norms and examine tax implications for in-system payouts
    • Consumer protection: Standardised disclosure framework to prevent mis selling and manage subscriber expectations

    Significance

    • Enhances predictability and security of retirement income
    • Strengthens trust and attractiveness of NPS
    • Supports the vision of Viksit Bharat 2047 with financial dignity in old age
    [2017] Who among the following can join the National Pension System (NPS)? 

    (a) Resident Indian citizens only 

    (b) Persons of age from 21 to 55 only 

    (c) All State Government employees joining the services after the date of notification by the respective State Governments 

    (d) All Central Governments Employees including those of Armed Forces joining the services on or after 1st April, 2004

  • Havana Syndrome Back 

    Why in the News?

    A renewed debate has emerged in the United States over Havana Syndrome after reports that the United States Department of Defense has been testing a covertly acquired device capable of emitting pulsed radio frequency energy, according to a report by CNN.  

    What is Havana Syndrome

    • Also officially termed Anomalous Health Incidents (AHIs)
    • First reported in 2016 by US diplomats stationed in Havana, Cuba
    • Symptoms include:
      • Severe headaches
      • Dizziness and vertigo
      • Cognitive difficulties and memory issues
      • Sensations similar to head trauma without visible injury
    • Since then, cases have been reported across Europe, Asia, Latin America and Africa
    • Affected personnel include:
      • Diplomats
      • Intelligence officers
      • Military personnel

    Why It Is Difficult to Diagnose

    • No single, universally accepted medical definition
    • Delayed clinical examinations in many cases
    • Symptoms overlap with stress related and neurological disorders
    • Lack of direct physical evidence in most incidents

    Cause: 

    Havana Syndrome, officially termed Anomalous Health Incidents (AHIs), does not have one conclusively proven cause.

    • Pulsed electromagnetic / microwave energy: Most plausible explanation. Can cause neurological symptoms without visible injury.
    • Possible directed-energy device exposure: Suspected use of portable energy-emitting devices for covert harassment or surveillance.
    • Psychological and stress-related factors: High-stress diplomatic environments may have contributed in some cases.
    • Acoustic (sound-based) causes: Initially suspected but largely ruled out due to weak scientific support.
    • Environmental or chemical exposure: Considered but no common toxin identified across locations.
    [2010] Consider the following: 

    1. Bluetooth device 

    2. Cordless phone 

    3. Microwave oven 

    4. Wi-Fi device 

    Which of the above can operate between 2.4 and 2.5 GHz range of radio frequency band? 

    (a) 1 and 2 only (b) 3 and 4 only (c) 1, 2 and 4 only (d) 1, 2, 3 and 4

  • Karuna Abhiyan 2026

    Why in the News?

    The Chief Minister of Gujarat Bhupendra Patel visited the Wildlife Care Centre at Bodakdev, Ahmedabad to review rescue and treatment operations under Karuna Abhiyan 2026, a statewide initiative to rescue birds injured by kite strings during the Uttarayan festival.

    About Karuna Abhiyan

    • Karuna Abhiyan is a state led compassionate wildlife rescue campaign aimed at saving birds and animals injured during festivals, especially Uttarayan.
    • It focuses on rescue, treatment, rehabilitation and release of injured wildlife.
    • Launched in 2017
    • First state driven initiative of its kind in India
    • Implementing Departments: Forest Department, Animal Husbandry Department, Municipal bodies and Voluntary organisations and NGOs

    Special Features

    • Water Birds Unit for specialised avian care
    • 24×7 WhatsApp helpline: 8320002000
      • Sending “Hi” provides district wise treatment centre details
    • Emergency helpline: 1926
    • Animal Husbandry helpline: 1962

    Prelims Pointers

    • Karuna Abhiyan was launched in 2017 by Gujarat
    • Conducted mainly during Uttarayan
    • Focuses on bird and animal rescue
    • Uses WhatsApp based grievance and rescue reporting
    • Considered the first state driven wildlife rescue campaign in India
    [2014] Every year, a month-long ecologically important campaign/festival is held during which certain communities/tribes plant saplings of fruit-bearing trees. Which of the following are such communities/tribes? 

    (a) Bhutia and Lepcha 

    (b) Gond and Korku 

    (c) Irula and Toda 

    (d) Sahariya and Agariya

  • India must focus on AI and its environmental impact

    Why in the News?

    Artificial Intelligence is expanding rapidly across sectors. However, its environmental costs remain largely ignored in policy discussions. The global ICT sector contributes 1.8-2.8% of global greenhouse gas emissions, with estimates rising to 2.1-3.9%. For the first time, clear data is available on the energy, water, and carbon footprint of AI systems, including Large Language Models (LLMs).

    A clear gap exists between perceived digital efficiency and actual environmental impact. A single ChatGPT query consumes 10 times more energy than a Google search. Training one LLM can emit up to 3,00,000 kg of carbon dioxide. Despite these costs, India has no formal system to measure or disclose AI’s environmental impact. This contrasts with the EU and the US, highlighting a major governance gap.

    What is the scale of AI’s environmental footprint?

    1. Global ICT emissions: Accounts for 1.8-2.8% of global GHG emissions, with upper estimates reaching 3.9%.
    2. Carbon-intensive training: Training a single LLM can emit ~3,00,000 kg of carbon dioxide.
    3. Comparative impact: Emissions from one deep learning model equal emissions from five cars over their lifetime.
    4. Data gap: Carbon footprint data of AI models and users remains fragmented and inconsistent.

    How does AI affect energy consumption patterns?

    1. High energy intensity: Each ChatGPT query consumes 10× more energy than a Google search.
    2. Hidden electricity demand: AI workloads rely on energy-intensive data centres and specialised hardware.
    3. Misleading averages: Claims such as 0.24 watt-hours per AI query underestimate system-wide consumption.

    Why is water consumption emerging as a major concern?

    1. UNEP projection: AI data centres may consume 4.2-6.6 billion cubic metres of water by 2027.
    2. Cooling requirements: Water is extensively used to cool AI servers.
    3. Water security risks: High freshwater withdrawal threatens water-stressed regions.

    What global governance responses are emerging?

    1. UNESCO framework (2021): Recognises negative environmental impacts of AI; adopted by ~190 countries.
    2. European Union leadership:
      1. AI Act, 2024: Introduces environmental accountability in AI governance.
      2. Harmonised AI rules: Address sustainability alongside ethics and safety.
    3. United States approach: Sector-specific regulations addressing AI’s environmental externalities.

    Why does India need a regulatory shift?

    1. Unaccounted externalities: Environmental costs of AI development remain outside policy evaluation.
    2. Regulatory vacuum: No mandatory assessment of AI’s environmental impact.
    3. Climate obligations: AI expansion risks undermining India’s climate mitigation commitments.
    4. Policy imbalance: Focus on innovation without parallel sustainability safeguards.

    How can Environmental Impact Assessment be extended to AI?

    1. EIA framework: India’s EIA Notification, 2006 mandates environmental assessment for infrastructure projects.
    2. Proposed extension: Inclusion of AI development and deployment within EIA scope.
    3. Lifecycle evaluation: Assessment of energy use, water consumption, and emissions across AI lifespans.

    What role can disclosure standards play?

    1. ESG integration: Environmental impact of AI included under ESG disclosure norms.
    2. SEBI alignment: Disclosure of emissions from data centres and computing activities.
    3. EU precedent: Corporate Sustainability Reporting Directive (CSRD) mandates emission disclosure, including AI training.
    4. Transparency outcome: Enables informed policymaking and accountability.

    Which sustainable practices can mitigate AI’s impact?

    1. Pre-trained models: Reduces repeated energy-intensive training.
    2. Renewable energy: Powering data centres through clean energy sources.
    3. Efficiency reporting: Disclosure of AI-specific environmental metrics.
    4. Resource optimisation: Minimising water and energy intensity of AI infrastructure.

    Conclusion

    India’s AI ambitions must align with environmental sustainability. Institutionalising environmental assessment, disclosure norms, and sustainable practices is essential to prevent AI-driven ecological externalities. A regulatory framework that integrates innovation with environmental accountability will ensure AI remains a tool for inclusive and sustainable development.

    PYQ Relevance

    [UPSC 2023] How can Artificial Intelligence help clinical diagnosis? Do you perceive any threat to privacy of the individual in the use of AI in healthcare?

    Linkage: Earlier, UPSC focused on how AI helps healthcare and affects patient privacy. Now, as AI use expands, questions are likely to include its environmental impact, especially energy- and data-intensive AI systems.

  • CEC Recommends Restoring Original ESZ Around Bannerghatta National Park

    Why in the News?

    In January 2026, the Central Empowered Committee (CEC) recommended restoring the original 2016 Ecologically Sensitive Zone (ESZ) around Bannerghatta National Park, reversing the reduced ESZ notified in 2020.

    About Bannerghatta National Park (BNP)

    • A protected wildlife reserve and biodiversity hotspot
    • Acts as the southern green lung of Bengaluru
    • Crucial for conserving forests, elephants, and wildlife corridors
    • Located in the Anekal hill range, Karnataka

    Geological and Physical Features

    • Granite hill ranges: Ancient granite formations of the Anekal Hills
    • Moist deciduous valleys: Support elephants, deer and predators
    • Dry scrub uplands: Important grazing habitats
    • Wildlife corridors: Links BR Hills and Sathyamangalam forests, forming a key elephant corridor
    • Water system: Suvarnamukhi stream flows through the park, sustaining wildlife

    What is the ESZ Issue

    • 2016 draft ESZ: 268.9 sq km
    • 2020 notification: Reduced to 168.64 sq km
    • Reduction excluded:
      • Key elephant corridors
      • Critical forest buffer zones
    • Resulted in increased pressure from:
      • Real estate expansion
      • Quarrying
      • Industrial activities
    • Heightened human animal conflict near rapidly expanding Bengaluru

    Prelims Pointers

    • Bannerghatta National Park lies in Karnataka near Bengaluru
    • Forms a vital elephant corridor in southern India
    • ESZ reduction occurred in 2020
    • CEC functions under the Supreme Court of India
    • ESZs regulate activities like mining, industries and construction near protected areas
    [2014] With reference to ‘Eco-Sensitive Zones’, which of the following statements is/are correct? 

    1. Eco-Sensitive Zones are the areas that are declared under the Wildlife (Protection) Act, 1972

    2. The purpose of the declaration of Eco-Sensitive Zones is to prohibit all kinds of human activities in those zones except agriculture

    Select the correct answer using the code given below: 

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

  • Greenwald Limit in Fusion Research

    Why in the News?

    China’s Experimental Advanced Superconducting Tokamak (EAST) fusion reactor has achieved stable plasma densities 30 to 65 percent higher than the Greenwald limit, overcoming a decades old constraint in nuclear fusion research.

    About Greenwald Limit

    • The Greenwald limit is a theoretical upper limit on plasma density in a tokamak fusion reactor.
    • It links the maximum stable plasma density to:
      • Plasma current
      • Size of the tokamak
    • Crossing this limit usually causes plasma instability and sudden collapse.

    Why the Greenwald Limit Matters?

    • Nuclear fusion requires:
      • Very high temperature
      • High plasma density
      • Sufficient confinement time
    • The Greenwald limit restricted how much fuel plasma could be packed into a tokamak.
    • It has been a major bottleneck to achieving self sustaining fusion or ignition.

    Prelims Pointers

    • Greenwald limit applies to tokamak fusion reactors
    • Exceeding it traditionally causes plasma instability
    • EAST achieved stable plasma beyond this limit
    • Breakthrough achieved by plasma wall interaction control
    • Important for progress towards fusion ignition and clean energy
    [2016] India is an important member of the ‘International Thermonuclear Experimental Reactor’. If this experiment succeeds, what is the immediate advantage for India? 

    (a) It can use thorium in place of uranium for power generation

    (b) It attains a global role in satellite-navigation

    (c) It can drastically improve the efficiency of its fission reactors in power generation

    (d) It can build fusion reactors for power generation

  • Air Pollution Aerosols Intensify and Prolong Winter Fog Over North India: IIT Madras Study

    Why in the News

    A Indian Institute of Technology Madras led study published in Science Advances shows that air pollution aerosols are making winter fog over north India denser and longer lasting, worsening visibility and health impacts.

    About Aerosols

    • Aerosols are tiny solid or liquid particles suspended in the atmosphere.
    • They strongly influence air quality, weather and climate.
    • Natural sources: desert dust, sea spray, volcanic ash, forest fires
    • Human sources: vehicle emissions, industrial pollution, biomass burning, coal and diesel use
    • Primary aerosols are emitted directly.
    • Secondary aerosols form in the air from gases like sulphur dioxide and nitrogen oxides.

    Key Features

    • Extremely small size: penetrate deep into lungs and remain airborne easily
    • Persistence: stay suspended for days to weeks, travel long distances
    • Condensation nuclei: provide surfaces for water vapour to condense, aiding fog and cloud formation
    • Radiative effects:
      • Scatter sunlight: reflective aerosols cool the surface
      • Absorb heat: black carbon warms the atmosphere

    How Aerosols Affect Winter Fog

    • Increase number of fog droplets, making fog thicker
    • Reduce sunlight reaching the surface, causing cooling that sustains fog
    • Slow fog dissipation, leading to prolonged low visibility episodes

    Prelims Pointers

    • Aerosols act as condensation nuclei for fog and clouds
    • Black carbon absorbs heat while sulphate aerosols reflect sunlight
    • Human sources significantly amplify winter fog over north India
    • Aerosols influence health, visibility, weather and climate simultaneously
    [2019] In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol into stratosphere? 

    (a) Creating the artificial rains in some regions 

    (b) Reducing the frequency and intensity of tropical cyclones 

    (c) Reducing the adverse effects of solar wind on the Earth 

    (d) Reducing the global warming

  • PSLV-C62 Mission Failure

    Why in the News

    The Indian Space Research Organisation’s first launch of 2026, the PSLV-C62 mission, failed to place 16 satellites into the intended orbit on 12 January 2026. This marks the second consecutive failure of the Polar Satellite Launch Vehicle (PSLV), ISRO’s most reliable launch vehicle for over three decades.

    About PSLV-C62 Mission

    • Launch Vehicle: Polar Satellite Launch Vehicle
    • Payload: 16 satellites
      • Includes 7 foreign satellites
    • Mission outcome: Failed to reach intended orbit
    • Failure stage: Third stage (after successful completion of first two stages)

    Why the Failure Matters

    • PSLV is known as ISRO’s workhorse, with a long record of success since the 1990s.
    • This is the second straight PSLV failure, the first occurring in May 2025.
    • Consecutive failures raise concerns about reliability in the third stage, a critical phase of orbital insertion.

    Possible Cause of Failure

    • Exact cause not yet identified.
    • Based on the May 2025 failure, issues may relate to:
      • Drop in combustion chamber pressure in the third stage motor
      • Reduced thrust leads to insufficient acceleration needed to stabilise orbit
    • The Failure Analysis Committee report of the previous mission has not been made public.

    Why the Third Stage is Critical

    • The third stage provides high acceleration required to:
      • Maintain orbital velocity
      • Prevent premature orbital decay
    • Any pressure or thrust instability at this stage directly impacts mission success.

    PSLV: Four-Stage Configuration (Prelims Focus)

    1. First Stage
      • Solid propellant
      • Provides lift-off and overcomes gravity and atmospheric drag
      • Carries rocket to ~50–60 km altitude
    2. Second Stage
      • Liquid propellant
      • Improves velocity and stabilisation
    3. Third Stage
      • Solid motor
      • Provides rapid acceleration for orbital insertion
      • Most failure-prone stage in recent missions
    4. Fourth Stage
      • Liquid engines
      • Fine-tunes orbit and deploys satellites

    Prelims Pointers

    • PSLV is a four-stage launch vehicle.
    • Recent PSLV failures occurred during the third stage.
    • Combustion chamber pressure is critical for orbital velocity.
    • PSLV has been operational for over 30 years.
    • ISRO has not yet released the Failure Analysis Committee report for the 2025 failure.
    [2018] With reference to India’s satellite launch vehicles, consider the following statements: 

    1. PSLVs launch the satellites useful for Earth resources monitoring whereas GSLVs are designed mainly to launch communication satellites

    2. Satellites launched by PSLV appear to remain permanently fixed in the same position in the sky, as viewed from a particular location on Earth

    3. GSLV Mk III is a four-stage launch vehicle with the first and third stages using solid rocket motors, and the second and fourth stages using liquid rocket engines. 

    Which of the statements given above is/are correct? 

    (a) 1 only (b) 2 and 3 (c) 1 and 2 (d) 3 only