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Type: Prelims Only

  • International Space Agencies – Missions and Discoveries

    Fracture Discovered in a Cosmic Bone of the Milky Way

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Why in the News?

    NASA has released an image of a fractured structure in the Milky Way’s galactic centre. The feature, named G359.13, was captured using X-ray data from Chandra and radio data from South Africa’s MeerKAT array.

    Fracture Discovered in a Cosmic Bone of the Milky Way

    What is G359.13?

    • G359.13 is a long, linear structure near the centre of the Milky Way.
    • It is often referred to as a cosmic bone due to its shape and density.
    • It stretches about 230 light-years in length, making it one of the longest and brightest features of its kind in the galaxy.
    • It lies about 26,000 light-years from Earth, close to the Milky Way’s centre.
    • For context, over 800 stars exist within a radius of 230 light-years from Earth—the same length as this cosmic bone.

    New Discovery: A Fracture in G359.13

    • Astronomers identified a distinct break or fracture in the structure’s continuous body.
    • An X-ray and radio source was also detected precisely at the location of the fracture.
    • Scientists believe a pulsar—a magnetised, rotating neutron star—collided with G359.13.
    • The pulsar was likely moving at a speed of 1–2 million miles per hour at the time of impact.
    • The collision disrupted the structure, creating a visible fracture.

    Back2Basics: What is a Pulsar?

    • A pulsar is a neutron star that emits beams of electromagnetic radiation from its magnetic poles.
    • Though only about 20 km in diameter, it is more massive than the Sun.
    • Pulsars rotate extremely rapidly, some spinning hundreds of times per second.
    • When their radiation beam crosses Earth’s line of sight, we observe pulses of radiation, hence the name.

     

    [UPSC 2003] The time taken by the sun to revolve around the centre of our galaxy is

    Options: (a) 25 million years (b) 100 million years (c) 250 million years* (d) 500 million years

     

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  • Waste Management – SWM Rules, EWM Rules, etc

    Microplastics disrupting the Ocean’s Carbon Cycle

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    A study published in Nature reveals that microplastics have deeply infiltrated the ocean, affecting the planet’s biogeochemical and carbon cycles.

    Microplastics

    Key Findings of the Study:

    • Microplastics (1–100 micrometres) dominate the ocean’s water column, especially below surface layers, unlike larger plastic fragments (100–5,000 micrometres) which remain near the surface.
    • Subsurface microplastics were found as deep as 100 metres within ocean gyres—rotating currents that trap and accumulate debris.
    • Data was compiled from 1,885 ocean stations (2014–2024), focusing on 50 cm below surface (subsurface layer).
    • Over 56 polymer types were detected; buoyant polymers, common in global plastic production, were most prevalent.
    • Sources identified:
      • Fishing gear, including nylon and polyester nets, was a significant contributor to deep-sea microplastics.
      • Plastics sampled often had production dates from the 20th century, highlighting their long degradation timelines.
      • Atmospheric deposition contributes 0.013–25 million tonnes annually, with polyester dominant in airborne microplastics.

    About Allochthonous Carbon:

    • Allochthonous carbon is carbon from external sources introduced into an ecosystem, not produced within it.
    • In oceans, plastics are a major source of allochthonous carbon, as they come from land-based human activities.
    • Microplastics contribute measurable carbon mass to marine systems, altering natural carbon ratios in ocean layers.
    • This distorts the marine carbon pump by affecting the flow and composition of particulate organic carbon (POC).
    • Impacts:
      • Plastic-derived carbon lacks radiocarbon, which may cause marine POC samples to appear around 420 years older.
      • It disrupts microbial activity, nutrient cycling like nitrification and denitrification, and organic matter decomposition.
      • Marine microbes ingest plastic-C, affecting food chains and altering biological processes at the base of ecosystems.
    [UPSC 2012] What would happen if phytoplankton of an ocean is completely destroyed for some reason?

    Statements:

    1. The ocean as a carbon sink would be adversely affected.

    2. The food chains in the ocean would be adversely affected.

    3. The density of ocean water would drastically decrease.

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

     

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  • Climate Change Negotiations – UNFCCC, COP, Other Conventions and Protocols

    Biological Diversity (Access and Benefit Sharing) Regulation, 2025

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    The National Biodiversity Authority (NBA) has released new rules to regulate access to biological resources and ensure fair and equitable benefit sharing, as approved by the Central Government.

    About New Biodiversity Regulation, 2025:

    • It governs how benefits from the use of biological resources and associated traditional knowledge or digital sequence information (DSI) are to be shared.
    • It introduces a tiered benefit-sharing structure based on annual turnover of the user:
      • No sharing for turnover up to ₹5 crore.
      • 0.2% for turnover between ₹5–50 crore.
      • 0.4% for ₹50–250 crore, and 0.6% above ₹250 crore.
    • Users must submit resource usage statements annually if turnover exceeds ₹1 crore.
    • Cultivated medicinal plants are exempt, aligning with the Biodiversity (Amendment) Act, 2023.
    • For high-value or threatened species like red sanders, agarwood, and sandalwood, sharing must be at least 5%, rising to 20% or more for commercial use.
    • The Regulation covers researchers, IP right seekers, and includes digital data as part of benefit sharing for the first time.

    Back2Basics: Convention on Biological Diversity (CBD):

    • CBD was adopted at the 1992 Rio Earth Summit; it came into force since 29 December 1993 with secretariat in Montreal, Canada.
    • It is ratified by 196 countries, excluding the US.
    • Key objectives:
      • Conservation of biological diversity.
      • Sustainable use of biodiversity components.
      • Fair sharing of benefits from genetic resources.
    • It is governed by the Conference of the Parties (COP), meeting biennially.
    • COP16 (2024) in Colombia established a multilateral benefit-sharing mechanism for Digital Sequence Information (DSI).
    • It ensures fair reward for communities protecting biodiversity when their knowledge or genetic data is used commercially.

    Nagoya Protocol on ABS:

    • It was adopted in 2010, enforced in 2014, it supplements the CBD.
    • It provides a legal framework for fair benefit-sharing from the use of genetic resources with the country of origin or local communities.
    • It strengthens the global framework for responsible biodiversity use.

     

    [UPSC 2023] Consider the following statements:

    1. In India, the Biodiversity Management Committees are key to the realization of the objectives of the Nagoya Protocol.

    2. The Biodiversity Management Committees have important functions in determining acces and benefit sharing, including the power to levy collection fees on the access of biological resources within its jurisdiction.

    Which of the statements given above is/are correct?

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

     

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  • Interstate River Water Dispute

    Water Sharing Dispute between Punjab and Haryana

    Prelims Only | Polity | Mains Paper 2: Federalism

    Why in the News?

    Tensions escalated between Punjab and Haryana after the Bhakra Beas Management Board (BBMB) decided to release an extra 4,500 cusecs of water from the Bhakra dam to Haryana, sparking political and legal opposition from Punjab.

    Water Sharing Dispute between Punjab and Haryana

    About the Punjab-Haryana Water Dispute:

    • The dispute dates back to 1966 when Haryana was created from Punjab and was promised a share of river waters from the Ravi and Beas rivers.
    • The Satluj-Yamuna Link (SYL) canal was proposed to deliver Haryana’s share but remains incomplete due to Punjab’s resistance.
    • The current issue involves Punjab and Haryana over the release of additional water from the Bhakra dam, managed by the Bhakra Beas Management Board (BBMB).
    • On April 30, 2025, BBMB ordered the release of 8,500 cusecs of water to Haryana for drinking needs, which Punjab opposed, claiming Haryana had already withdrawn 104% of its annual share.
    • Water levels in the Bhakra, Pong, and Ranjit Sagar dams are low due to poor snowfall in the Himalayas.
    • Punjab argues that BBMB’s decision is unilateral and has refused to open the Nangal dam sluice gates.

    Inter-State Water Dispute Resolution in India:

    Water Sharing Dispute between Punjab and Haryana

    • Article 262 of the Constitution empowers Parliament to legislate on inter-state river water disputes and bar courts from intervening in such matters.
    • River Boards Act, 1956 allows creation of boards for inter-state river management, but no such board has ever been constituted.
    • Inter-State Water Disputes Act, 1956 provides for:
      • Conciliation by the Centre among aggrieved states.
      • Tribunal formation if conciliation fails.
    • The 2002 amendment mandates:
      • Formation of a tribunal within 1 year.
      • Tribunal decision within 3 years.
    • Supreme Court cannot question the award of a tribunal but can examine procedural issues.
    • Other prominent disputes include Krishna, Cauvery, and the Satluj Yamuna Link canal disputes.
    [UPSC 2006] Recently Uttar Pradesh and Madhya Pradesh governments signed a Memorandum of Understanding for the linking of two rivers as a link project. Which are these two rivers?

    Options: (a) Betwa and Chambal (b) Betwa and Ken* (c) Chambal and Son (d) Ken and Narmada

     

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  • Genetically Modified (GM) crops – cotton, mustards, etc.

    ‘Kamala’ and ‘Pusa DST Rice 1’ GM Rice

    Prelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Why in the News?

    India’s Agriculture Minister has introduced ‘Kamala’ and ‘Pusa DST Rice 1’, the country’s first genome-edited rice varieties, developed by ICAR. These are also the world’s first genome-edited rice varieties.

    About ‘Kamala’ and ‘Pusa DST Rice 1’:

    • Kamala (DRR Dhan 100): Developed by ICAR-IIRR Hyderabad, derived from Samba Mahsuri; shows higher yield, early maturity, drought tolerance.
    • Pusa DST Rice 1: Developed by ICAR-IARI Delhi, based on MTU1010; improves drought and salinity tolerance.
    • Agencies involved: Indian Council of Agricultural Research (ICAR), ICAR-IIRR, ICAR-IARI.
    • They were created using CRISPR-Cas9-based genome editing, specifically Site Directed Nuclease 1 (SDN1). It has NO foreign DNA inserted.
    • It has been approved by Institutional Biosafety Committees (IBC) and Review Committee on Genetic Manipulation (RCGM) under relaxed genome-edit rules.

    Specific Benefits Offered:

    • Yield boost:
      • Kamala: +19% over Samba Mahsuri (avg. 5.37 t/ha, max. up to 9 t/ha).
      • Pusa DST Rice 1: +9.6% to +30.4% over MTU1010 under stress conditions.
    • Climate resilience:
      • Kamala: Drought tolerance, early maturity.
      • Pusa DST: Salt and drought tolerance for saline/alkaline/coastal soils.
    • Water saving: Kamala matures 20 days early → saves 3 irrigations, i.e., 7,500 million m³ water.
    • Emission reduction: Cultivation over 5 million ha may reduce 32,000 tonnes GHG emissions (20% drop).
    • Food security support: Improved paddy output enhances India’s average yield, critical for 40% of total foodgrain basket.
    [UPSC 2018] With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements:

    1. GM mustard has the genes of a soil bacterium that give the plant the property of pest-resistance to a wide variety of pests.

    2.GM mustard has the genes that allow the plant cross-pollination and hybridization.

    3.GM mustard has been developed jointly by the IARI and Punjab Agricultural University.

    Which of the statements given above is/are correct?

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

     

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  • Electronic System Design and Manufacturing Sector – M-SIPS, National Policy on Electronics, etc.

    Repairability Index (RI) for Mobile and Electronics Sector

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    The Committee formed to design India’s Repairability Index (RI) framework has submitted its report to Department of Consumer Affairs.

    About Repairability Index (RI):

    • The RI is a standardized label that indicates how easily a product can be repaired by assessing multiple parameters.
    • It is designed to empower consumers to make informed decisions and promote sustainable consumption.
    • The RI is applicable initially to smartphones and tablets and uses a 5-point numeric scale for scoring.
    • The six key parameters used to calculate RI are:
      1. Disassembly Depth
      2. Repair Information
      3. Spare Parts Availability
      4. Software Updates
      5. Tools Required
      6. Fasteners Used
    • The scoring covers priority components such as battery, display, cameras, charging port, microphone, speaker, and hinge mechanism.
    • RI labels must be displayed at the point of sale, on e-commerce platforms, and via QR code on packaging.

    Recommendations of the RI Framework:

    • The RI framework must align with global best practices while maintaining ease of doing business for manufacturers.
    • Original Equipment Manufacturers (OEMs) will self-declare RI scores based on standard criteria, with no extra compliance burden.
    • A clear scoring methodology has been developed, with weightages assigned to each parameter for key parts.
    • The committee identified smartphones and tablets as the initial focus under the RI framework.
    • Stakeholder consultations included manufacturers, consumer groups, academic bodies, and government departments.
    • The framework complements the existing Right to Repair Portal (launched in 2022), which provides repair-related information across four sectors.
    • The committee emphasized the need for a robust post-sale ecosystem for both urban and rural consumers.
    [UPSC 2021] R2 Code of Practices’ constitutes a tool available for promoting the adoption of:

    Options: (a) environmentally responsible practices in electronics recycling industry*

    (b) ecological management of Wetlands of International Importance under the Ramsar Convention

    (c) sustainable practices in the cultivation of agricultural crops in degraded land

    (d) ‘Environmental Impact Assessment’ in the exploitation of natural resources

     

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  • Trade Sector Updates – Falling Exports, TIES, MEIS, Foreign Trade Policy, etc.

    “China Plus One” Strategy

    Prelims Only | Economics | Mains Paper 3: Investment Models

    Why in the News?

    Japanese companies, along with other global players, are increasingly turning to India under the China Plus One strategy, aiming to diversify supply chains and reduce overdependence on China.

    About China Plus One Strategy:

    • It is a global business model introduced in 2013 to reduce dependence on China by adding another country to the manufacturing or sourcing base.
    • It emerged due to concerns about geopolitical risks, trade tensions, and regulatory unpredictability in China.
    • The strategy gained momentum after the US–China trade war, China’s Zero-Covid policy, and increasing labour and compliance costs.
    • Its goal is to create resilient and diversified supply chains by operating in China and one or more alternative countries.
    • Vietnam, Mexico, and Taiwan have become early beneficiaries in sectors like machinery, electronics, and transport.

    Benefits for India:

    • India offers a large market, skilled labor, and cost advantages, making it an attractive destination for diversification.
    • The growing digital infrastructure and industrial corridors support the relocation of manufacturing, with government schemes like PLI and Make in India aligning with the China Plus One goals.
    • Challenges:
      • India faces limited integration into global value chains, logistics inefficiencies, and regulatory bottlenecks.
      • Historical protectionist trade policies and lack of participation in trade agreements like RCEP hinder its full potential.
      • To compete with nations like Vietnam or Mexico, India needs labour reforms, improved ease of doing business, and better trade facilitation.
    [UPSC 2021] Consider the following:

    1.Foreign currency convertible bonds 2.Foreign institutional investment with certain conditions 3.Global depository receipts 4.Non-resident external deposits Which of the above can be included in Foreign Direct Investments?

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

     

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  • Port Infrastructure and Shipping Industry – Sagarmala Project, SDC, CEZ, etc.

    PM inaugurates Vizhinjam Port

    Prelims Only | Economics | Mains Paper 3: Infrastructure: Energy, Ports, Roads, Airports, Railways Etc.

    Why in the News?

    Prime Minister has formally commissioned India’s first deep-sea transshipment port at Vizhinjam in Kerala.

    About Vizhinjam Port

    • Vizhinjam Port is India’s first deep-sea transshipment port located near Thiruvananthapuram.
    • Developed under a Public-Private Partnership (PPP) model, the port cost ₹8,900 crore to build.
    • It is operated by Adani Vizhinjam Port Pvt. Ltd., with a 61.5% stake held by Kerala’s government and 9.6% by the Central government.
    • Commercial operations began in December 2024, following a trial run in July 2024.
    • The port has handled 285 ships and processed 5.48 lakh TEUs since its operational launch.
    • Positioned just 10 nautical miles from a major international shipping route, it provides quick access to global trade lanes.

    Notable Features of the Port:

    • It is India’s first semi-automated port, utilizing AI-powered control rooms and the Indigenous Vessel Traffic Management System (VTMS).
    • Its deep natural draft (up to 24 meters) allows it to accommodate Ultra Large Container Vessels (ULCVs).
    • The current infrastructure includes a 3,000-meter breakwater and an 800-meter container berth, with full capacity expected by 2028–29 at 6.2 million TEUs annually.
    • The port is designed as a multi-purpose, green port, ensuring year-round operations.
    • Positioned 20 kilometers from Trivandrum International Airport, it offers seamless air-sea connectivity.
    [UPSC 2023] Consider the following pairs:

    Port—–Well known as

    1. Kamarajar Port—-First major port in India registered as a company

    2. Mundra Port—–Largest privately owned port in India

    3. Visakhapatnam—-Largest container port in India

    Options: (a) Only one pair  (b) Only two pairs*  (c) All three pairs  (d) None of the pairs

     

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  • Renewable Energy – Wind, Tidal, Geothermal, etc.

    Green Hydrogen Certification Scheme (GHCS)

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    The Ministry of New and Renewable Energy (MNRE) has launched Green Hydrogen Certification Scheme (GHCS) under the National Green Hydrogen Mission.

    About Green Hydrogen Certification Scheme (GHCS):

    • GHCS aims to certify that hydrogen produced in India meets the criteria to be labelled as “green hydrogen”, based on verified emissions data.
    • The scheme enhances transparency, credibility, and traceability in hydrogen production and supports India’s goal of becoming a global hub for green hydrogen exports.
    • The Bureau of Energy Efficiency (BEE) is the nodal agency responsible for the implementation of this scheme.
    • Certification under GHCS also helps producers access carbon credits under the Carbon Credit Trading Scheme (CCTS), subject to additional requirements.
    • The scheme covers hydrogen produced using electrolysis with renewable energy or biomass conversion.

    Key Features of GHCS:

    • Hydrogen will be certified as “green” if its non-biogenic greenhouse gas emissions are ≤ 2 kg CO₂ equivalent per kg of hydrogen, averaged over 12 months.
    • The certification process includes four stages:
      • Concept Certificate (project design stage)
      • Facility-Level Certificate (infrastructure readiness)
      • Provisional Certificate (early production data)
      • Final Certificate (verified emissions based on actual production)
    • Only the Final Certificate is mandatory for producers seeking government incentives or selling hydrogen in the domestic market.
    • Producers must appoint Accredited Carbon Verification (ACV) agencies for independent verification, recognized by the BEE.
    • The scheme is aligned with international standards like ISO 19870:2023, ensuring global credibility.
    • Certificates are issued in multiples of 100 kg of hydrogen, containing details on emission intensity and production sources.
    [UPSC 2023] 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 may of the above statements are correct?

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

     

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  • Climate Change Impact on India and World – International Reports, Key Observations, etc.

    Changing patterns of Western Disturbances

    Prelims Only | Geography | Mains Paper 1: Important Geophysical Phenomena

    Why in the News?

    Heavy rainfall and strong winds disrupted life in Delhi due to a fresh splash of Western Disturbances over North India.

    Changing patterns of Western Disturbances

    What are Western Disturbances?

    • Western Disturbances are extra-tropical weather systems that originate near the Mediterranean region.
    • They carry moisture from the Mediterranean Sea, Black Sea, Caspian Sea, and Arabian Sea.
    • These disturbances are embedded within the subtropical westerly jet stream, a fast-moving air current in the upper atmosphere.
    • They bring rain, snow, and fog, especially from December to March, as they encounter the Himalayas, causing rainfall in the plains and snowfall at higher altitudes.
    • They are responsible for most of the winter and pre-monsoon rainfall in Northwest India and are critical for rabi crops like wheat.

    Recent Changes in its Pattern:

    • Recent observations show an increase in frequency, particularly from late January onwards, with disturbances now occurring outside the winter season.
    • These disturbances have been observed even in May, June, and July, where they were once rare.
    • The geographic spread of these disturbances is widening, affecting larger parts of North and Northwest India.
    • Reasons behind:
      • The strengthening of the subtropical westerly jet stream, likely influenced by rising global temperatures, is a key factor.
      • The delayed retreat of the jet stream is affecting the timing of the summer monsoon, leading to overlapping weather patterns.
      • The warming of the Arabian Sea (by 1.2°C to 1.4°C over recent decades) is increasing moisture, intensifying rainfall.
    [UPSC 2015] Consider the following statements:

    1. The winds which blow between 30° N and 60° S latitudes throughout the year are known as westerlies. 2. The moist air masses that cause winter rains in North-Western region of India are part of westerlies.

    Which of the statements given above is/are correct?

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

     

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