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GS Paper: GS3

  • Sir Creek Border Dispute

    Why in the News?

    Union Defence Minister recently warned Pakistan against misadventure in the Sir Creek region, stressing India’s resolve to defend its territorial integrity.

    Sir Creek Border Dispute

    About Sir Creek:

    • Location & Geography: Sir Creek is a 96-km-long tidal estuary in the Rann of Kutch, forming part of the border between Gujarat (India) and Sindh (Pakistan).
    • Physical Features: It flows into the Arabian Sea, with marshy, saline mudflats that provide vital habitat for migratory birds.
    • Historical Name: Originally known as Ban Ganga, renamed Sir Creek after a British surveyor, Sir Richard Burton (commonly credited).
    • Economic & Strategic Importance: The area hosts rich fishing grounds and potential oil and gas deposits, while being crucial for maritime boundary delimitation and coastal security.

    Historical Background of the Dispute:

    • 1908 Conflict: Disagreement between the Kutch ruler (British India) and Sindh government over fishing rights and territorial limits.
    • 1914 Bombay Government Resolution: Placed the boundary along the eastern bank (favouring Sindh/Pakistan), but also referred to the Thalweg Principle, supporting India’s claim.
      • This principle defines the border along the line of greatest depth of a river’s main navigable channel
    • 1924–25 Developments: Boundary pillars were erected and Survey of India maps marked the mid-channel as the boundary, strengthening India’s case.
    • Post-Partition Period: Dispute intensified; following the 1965 India–Pakistan war, the Rann of Kutch issue went to a UN-sponsored Tribunal.
    • 1968 Tribunal Award: Allocated 90% of the Rann to India but excluded Sir Creek, leaving it unresolved.
    • Post-1982 UNCLOS Impact: With the introduction of Exclusive Economic Zones (EEZs), control over Sir Creek gained renewed importance for maritime claims and resource access.

    India’s Position:

    • Navigability Claim: India asserts that Sir Creek is navigable at high tide, making the Thalweg Principle applicable.
    • Legal & Historical Basis:
      • 1925 Resolution and Survey of India maps.
      • Boundary pillars of 1924 marking mid-channel.
      • 1819 Treaty between East India Company and Kutch rulers, showing continued Indian jurisdiction.
    • Geographical Argument: India maintains the Rann is land, not water, invalidating Pakistan’s demand for median-line division.
    • Strategic Implication: Acceptance of India’s position ensures larger EEZ access, security leverage, and greater control in the Arabian Sea.
    [UPSC 2022] Consider the following countries:

    1. Azerbaijan 2. Kyrgyzstan 3. Tajikistan 4. Turkmenistan 5. Uzbekistan

    Which of the above have borders with Afghanistan ?

    Options: (a) 1, 2 and 5 only (b) 1, 2, 3 and 4 only (c) 3, 4 and 5 only* (d) 1, 2, 3, 4 and 5

     

  • Govt identifies 100 Aspirational Agriculture Districts (AADs)

    Why in the News?

    The Centre has announced the identification of 100 Aspirational Agriculture Districts under the Prime Minister Dhan-Dhaanya Krishi Yojana (PMDDKY) to boost farm productivity, sustainability, and rural incomes.

    What are Aspirational Agriculture Districts (AADs)?

    • Overview: The AADs comprise 100 districts across 29 States and Union Territories with low productivity, moderate crop intensity, and limited access to agricultural credit.
    • Selection Basis: Districts were chosen to ensure balanced regional representation, considering each state’s net cropped area and number of operational holdings.
    • Purpose: Designed as focal points for agricultural transformation, akin to the Aspirational Districts Programme (ADP) model for holistic development.
    • Objective: Accelerate agricultural growth and raise farmers’ income through data-driven governance, technology adoption, and scheme convergence.
    • Leading States: Uttar Pradesh (12), Maharashtra (9), Madhya Pradesh & Rajasthan (8 each), and Bihar (7).
    • Implementation Mechanism: Each district formulates a District Agriculture Development Plan (DADP) integrating existing central and state schemes for productivity enhancement, irrigation, crop diversification, and credit inclusion.
    • Monitoring Framework: Employs a performance-based index with measurable outcome indicators for real-time progress tracking.

    About Prime Minister Dhan-Dhaanya Krishi Yojana (PMDDKY):

    • Overview: Introduced in July 2025 by the Ministry of Agriculture and Farmers Welfare.
    • Aim: Transform 100 low-performing agricultural districts into high-productivity, market-linked, and climate-resilient hubs.
    • Design: Modeled on the Aspirational Districts Programme, emphasizing saturation-based development in agriculture.
    • Key Objectives:
      • Boost productivity through modern technology and best practices.
      • Promote crop diversification and climate-resilient farming.
      • Expand irrigation coverage and credit access.
      • Strengthen post-harvest infrastructure, storage, and value addition at grassroots levels.
      • Build market linkages and sustainable practices for inclusive rural growth.
    • Implementation Structure:
      • Convergence of 36 schemes from 11 Ministries/Departments, with no separate budget allocation.
      • District PMDDKY Committees, headed by Collectors, plan and execute projects.
      • 100 Central Nodal Officers (CNOs), mostly Joint Secretaries, monitor implementation.
      • A digital dashboard tracks 117 indicators across agriculture, irrigation, and markets.
    • Budget & Duration: Convergence-based outlay of ₹24,000 crore annually for six years (FY 2025–31), benefiting 1.7 crore farmers.
    • Expected Outcomes:
      • Improved productivity, resilience, and market efficiency.
      • Enhanced credit systems and localized agri-infrastructure.
      • Contribution toward “Viksit Bharat 2047” through sustainable agricultural transformation.
    [UPSC 2020] Under the Kisan Credit Card scheme, short-term credit support is given to farmers for which of the following purposes?

    1. Working capital for maintenance of farm assets
    2. Purchase of combine harvesters, tractors and mini trucks
    3. Consumption requirements of farm households
    4. Post-harvest expenses
    5. Construction of family house and setting up of village cold storage facility

    Options:

    (a) 1, 2 and 5 only

    (b) 1, 3 and 4 only *

    (c) 2, 3, 4 and 5 only

    (d) 1, 2, 3, 4 and 5

     

  • Niti Aayog proposes Presumptive Taxation for Foreign Companies

    Why in the News?

    NITI Aayog has released a working paper recommending the introduction of an optional presumptive taxation scheme for foreign companies operating in India.

    What is Presumptive Taxation?

    • Overview: Presumptive taxation allows taxpayers to declare income at a fixed percentage (presumed rate) of total turnover or receipts without maintaining detailed books of accounts.
    • Purpose: Simplifies taxation for small businesses or specific sectors by reducing compliance and administrative burden.
    • Domestic Example: Under the Income Tax Act, Sections 44AD, 44ADA, and 44AE permit presumptive taxation for small businesses, professionals, and transporters.
    • Key Feature:
      • Tax is levied on deemed profits instead of actual income.
      • Taxpayers opting for this scheme are exempt from detailed audits or complex record-keeping.

    What has NITI Aayog Proposed?

    • Scope: Extend the presumptive taxation concept to foreign companies operating in India.
    • Objective: To reduce litigation related to Permanent Establishment (PE) status and profit attribution in cross-border taxation.
    • Main Features:
      • Optional Scheme: Foreign companies can either choose the presumptive scheme for certainty or file regular returns if actual profits are lower.
      • Sector-Specific Rates: Different deemed profit rates for sectors such as manufacturing, digital services, and logistics.
      • Safe Harbour Clause: Once a company opts in, tax authorities cannot separately litigate the PE existence for that activity.
      • Alignment with Global Norms: Codify PE and attribution principles in domestic law consistent with OECD standards.
      • Administrative Reforms: Training of tax officials to ensure consistent application in digital and cross-border cases.

    Significance:

    • Provides tax certainty and simplicity for foreign investors.
    • Reduces disputes and promotes ease of doing business.
    • Balances India’s sovereign tax rights with the need for a predictable, investor-friendly regime.
    • Positions India as a more attractive FDI destination, aligned with its economic and tax reform agenda.
    [UPSC 2020] With reference to India’s decision to levy an equalization tax of 6% on online advertisement services offered by non-resident entities, which of the following statements is/are correct?

    1. It is introduced as a part of the Income Tax Act.

    2. Non-resident entities that offer advertisement services in India can claim a tax credit in their home country under the “Double Taxation Avoidance Agreements”.

    Select the correct answer using the code given below:

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

     

  • Cost of convenience, health hazards a a side effect of using digital tools

    Introduction

    India’s embrace of the digital revolution has been rapid and transformative. From smartphones to smart homes, electronics have become integral to urban living. However, this transformation carries a dark underbelly: the mounting crisis of e-waste. In 2025, India generated 2.2 million tonnes of e-waste, becoming the third-largest generator globally, after China and the United States. Despite having a formal recycling capacity of over 2.2 million MT, more than half of India’s e-waste is still processed informally, exposing millions to toxic substances. The issue is not just environmental but also a public health catastrophe, disproportionately affecting the poor and marginalised.

    Why is e-waste in the news?

    India’s e-waste problem is no longer a distant warning but an immediate crisis. The country has seen a 150% surge in e-waste since 2017–18 (0.71 MT to 2.2 MT in 2025), with projections of doubling by 2030. Cities like Seelampur (Delhi), Moradabad (UP), and Bhiwandi (Maharashtra) have emerged as hotspots of informal recycling, where toxic fumes and crude dismantling methods poison both workers and residents. Despite 322 formal recycling units, informal handlers dominate the sector, creating one of the sharpest contrasts between policy design and ground reality.

    The Escalating Burden of E-Waste

    1. Third-largest generator: India stands only behind China and the U.S., producing 2.2 MT of e-waste in 2025.
    2. Rapid growth: A 150% surge in seven years, expected to double by 2030.
    3. Urban hotspots: Over 60% of e-waste originates from just 65 cities; major hubs include Seelampur, Mustafabad, Moradabad, and Bhiwandi.

    Why informal recycling is a ticking time bomb

    1. Crude methods: Manual dismantling, open burning, and acid leaching without protective equipment.
    2. Toxic substances: Release of over 1,000 hazardous chemicals, including heavy metals (lead, cadmium, mercury, chromium), POPs (dioxins, furans), and fine particulate matter (PM₂.₅ and PM₁₀).
    3. Alarming air quality: PM₂.₅ levels in Seelampur exceed 300 µg/m³ — over 12 times higher than WHO’s safe limit of 25 µg/m³.

    How does e-waste impact human health?

    1. Respiratory illnesses: Workers show 76–80% prevalence of chronic bronchitis, asthma, persistent coughing (MDPI Applied Sciences, 2025).
    2. Neurological damage: Lead exposure linked to cognitive impairment, reduced IQ, attention deficits. WHO warns millions of children are at risk.
    3. Skin & ocular disorders: Rashes, burns, dermatitis; in Guiyu (China), exposure linked to miscarriages and preterm births.
    4. Genetic and systemic effects: DNA damage, oxidative stress, altered immune functions; children show higher vulnerability.
    5. Syndemic environment: E-waste risks compound poverty, malnutrition, and unsafe housing, worsening outcomes for urban poor.

    Policy response: Progress and gaps

    1. E-Waste (Management) Rules, 2022: Strengthened Extended Producer Responsibility (EPR), mandatory registration, incentives for formalisation.
    2. Weak enforcement: As of 2023–24, only 43% of e-waste was officially processed.
    3. Legal hurdles: Capping of EPR credit prices led to legal disputes with manufacturers.
    4. Gap: Informal handlers still dominate, undermining scientific recycling capacity.

    The Way Forward

    1. Formalise the informal: Integrate kabadiwalas through skill certification, PPE provision, healthcare, social security.
    2. Strengthen enforcement: Empower Pollution Control Boards, mandate digital tracking & audits.
    3. Expand medical surveillance: Health camps and long-term studies, especially on children in hotspots.
    4. Foster innovation: Promote local recycling technologies, decentralised treatment hubs.
    5. Raise awareness: Mass campaigns and school-level education on e-waste.

    Conclusion

    India’s digital empowerment cannot come at the cost of environmental collapse and human suffering. The e-waste crisis is not only a question of waste management but also of justice and public health. Unless India formalises its informal sector, strengthens enforcement, invests in technology, and raises awareness, the cost of convenience will continue to erode both ecosystems and human dignity.

    PYQ Relevance

    [UPSC 2018] What are the impediments in disposing the huge quantities of discarded solid wastes which are continuously being generated? How do we remove safely the toxic wastes that have been accumulating in our habitable environment?

    Linkage: The article on e-waste directly links to this PYQ as it highlights impediments like dominance of informal recycling, weak enforcement of E-Waste Rules, and lack of awareness, while also suggesting safe disposal measures such as formalisation, digital tracking, PPE use, decentralised hubs, and scientific recycling methods.

  • [pib] Centre approves National Pulses Mission

    Why in the News?

    The Union Minister for Agriculture & Farmers’ Welfare and Rural Development has approved the National Pulses Mission (Mission for Atmanirbharta in Pulses).

    About the National Pulses Mission:

    • Launch (2025): Approved by the Union Minister for Agriculture & Farmers’ Welfare and Rural Development to achieve self-sufficiency in pulses by 2030–31, improve nutrition, and raise farmer incomes.
    • Targets: Production to rise from 24.2 MT (2024–25) to 35 MT (2030–31); acreage 310 lakh ha, yield 1,130 kg/ha.
    • Coverage: 416 districts, with focus on rice fallows, improved seeds, intercropping, irrigation, and market linkages.
    • MSP Procurement: 100% assured for Tur, Urad, Masoor for four years under PM-AASHA Price Support Scheme, via NAFED/NCCF.
    • Framework: Under National Food Security Mission (NFSM); combines ICAR-led R&D with private sector inputs, processing, and storage.
    • Budget: ₹11,440 crore outlay up to 2030–31 for multi-year implementation.
    • Outcomes: Improved nutrition, soil fertility (nitrogen-fixing), stable prices, climate resilience, and rural employment.

    Key Features:

    • Cluster-Based Approach: Targets high-potential regions, diversifies beyond traditional belts, reduces risks.
    • Market Infrastructure: 1,000 post-harvest units (dal mills, grading, packaging) with subsidies up to ₹25 lakh/unit.
    • Research & Extension: New high-yield, climate-resilient varieties; farmer training on nutrient, pest, and water management.
    • Risk Cover: Subsidies, insurance, and credit to reduce cultivation risks.
    • Market Reforms: Direct sales linkages, transparent logistics, MSP-backed procurement.
    [UPSC 2020] With reference to pulse production in India, consider the following statements:

    1. Black gram can be cultivated as both kharif and rabi crop.

    2. Green-gram alone accounts for nearly half of pulse production.

    3. In the last three decades, while the production of kharif pulses has increased, the production of rabi pulses has decreased.

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

     

  • [pib] BRO Project Swastik marks 65 years of service

    Why in the News?

    Border Roads Organisation (BRO) Project Swastik celebrated its 65th Raising Day on October 01, 2025.

    About Project Swastik:

    • Origin: Established in 1960 as Project DRAGON, renamed Project Swastik on 1 October 1963.
    • Organisation: A flagship initiative of the Border Roads Organisation (BRO) under the Ministry of Defence.
    • Mandate: Construction and maintenance of strategic roads, bridges, and tunnels in the high-altitude Himalayan terrain.
    • Area of Responsibility: Covers North and East Sikkim up to forward border areas, also parts of North Bengal. The region is prone to landslides, fragile geology (Phyllites, Schists), and extreme weather conditions.
    • Strategic Role: Provides vital support for Armed Forces mobility, disaster relief operations, and socio-economic connectivity for remote communities.

    Major Accomplishments:

    • Road & Bridge Network: Built and maintained over 1,412 km of roads and 80 major bridges since inception.
    • Recent Achievements: In the last decade, completed 350 km of new roads, 26 bridges, and 1 tunnel, ensuring year-round access to forward areas.
    • Key Road Links: Developed lifelines like the Gangtok–Chungthang and Gangtok–Nathula roads, critical for defence and civilian movement.
    • Disaster Response: Effectively restored connectivity after Glacial Lake Outburst Floods (GLOFs), cloudbursts, and Teesta River floods. Widely praised during the 2023 Sikkim flash floods.

  • SARAL tool to simplify Scientific Research Papers

    Why in the News?

    The Anusandhan National Research Foundation (ANRF), India’s newest science funding agency, has launched a digital tool called SARAL (Simplified and Automated Research Amplification and Learning) to make scientific research more accessible.

    What is Anusandhan National Research Foundation (ANRF)?

    • Establishment: Created under the ANRF Act, 2023, replacing the Science and Engineering Research Board (SERB).
    • Nature: Acts as India’s apex science funding and policy-making body.

    • Mission & Objectives: 

      • Raise India’s R&D spending from 0.7% to 2% of GDP by 2030.
      • Mobilise 70% private sector participation in research funding.
      • Promote interdisciplinary research across sciences, technology, health, agriculture, humanities, and social sciences.
      • Align research with Viksit Bharat 2047 and the National Education Policy (NEP).

    • Structure:

      • Chairperson: Prime Minister of India (ex-officio).
      • Vice Presidents: Union Ministers of Science & Technology and Education.
      • Member Secretary: Principal Scientific Advisor.
      • Guided by a Governing Council and Executive Council for policy and funding.

    About SARAL:

    • Developer: Created by IIIT Hyderabad under the guidance of the Anusandhan National Research Foundation (ANRF).
    • Purpose: Designed to make complex research papers accessible to students, professionals, and the general public.
    • AI Use: Generates summaries in multiple formats such as slides, videos, posters, and podcasts.
    • Language Support: Available in 11 Indian languages, ensuring wider inclusivity in science communication.
    • Workflow: Users upload research papers (LaTeX, arXiv links, PDFs); AI divides into sections (Introduction, Methodology, Results, Discussion, Conclusion); it produces editable slides and video summaries.
    • Significance:
      • Democratises science by converting research into layman-friendly outputs.
      • Enhances science communication and outreach.
      • Builds awareness of cutting-edge research across disciplines.
    [UPSC 2015] Which of the following statements is/are correct regarding National Innovation Foundation-India (NIF)?

    1. NIF is an autonomous body of the Department of Science and Technology under the Central Government.

    2. NIF is an initiative to strengthen the highly advanced scientific research in India’s premier scientific institutions in collaboration with highly advanced foreign scientific institutions.

    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

     

  • More Women join the labour force, but are they really employed?

    Introduction

    The female labour force participation rate (FLFPR) is often viewed as a proxy for gender equality and economic dynamism. India’s FLFPR dropped from 31.2% in 2011-12 to 23.3% in 2017-18 but has dramatically risen to 41.7% in 2023-24. At first glance, this looks like a success story. However, closer scrutiny reveals that most women are being absorbed into agriculture, unpaid household enterprises, and low-paying self-employment, rather than formal or secure wage jobs. The paradox is clear: more women are being “counted” in the labour market, but their earnings and economic independence remain stagnant or declining.

    Why is female labour force participation in the news?

    1. Sharp rise in FLFPR: Jumped from 23.3% in 2017-18 to 41.7% in 2023-24.
    2. First-time reversal: After years of decline, the participation rate is rising again.
    3. Underlying concern: Despite more women “working,” earnings have fallen, and secure wage jobs remain elusive.
    4. Contradiction: Participation has grown, but instead of diversifying into services/industry, women are moving back into agriculture.

    What explains the rise in female participation?

    1. Rural women as drivers: Most of the rise is accounted for by women in rural India.
    2. Shift from domestic duties: Share of women reporting “domestic duties” fell from 57.8% (2017-18) to 35.7% (2023-24).
    3. Rise in unpaid helpers: Share of “helpers in household enterprises” rose from 9.1% to 19.6%.
    4. Self-employment increase: “Own account workers and employers” rose from 4.5% to 14.6%.

    Are women moving to better jobs?

    1. Agriculture dominance: Share of rural women in agriculture rose from 71.1% (2018-19) to 76.9% (2023-24).
    2. Decline in other sectors: Women’s share in both secondary (industry) and tertiary (services) sectors has fallen.
    3. Blurring boundaries: Women’s unpaid household work overlaps with helper roles in household enterprises, making it questionable whether this should count as “employment.”

    What about earnings and job quality?

    1. Declining real earnings: Except for casual workers, earnings have declined across categories—self-employed, salaried, and even employers.
    2. Vulnerability of self-employment: More women are reporting self-employment, but this has not translated into higher income.
    3. No wage expansion: Growth in FLFPR has not been accompanied by secure wage-based jobs.

    Why does this matter for India’s economy and gender equality?

    1. False signal of empowerment: Higher FLFPR without earnings security reflects distress-driven participation, not genuine empowerment.
    2. Economic vulnerability: Rising unpaid and low-paid work lowers household resilience and women’s autonomy.
    3. Policy challenge: Employment growth is not keeping pace with women’s entry into the workforce, pointing to structural issues in India’s labour market.

    Conclusion

    The sharp rise in India’s female labour force participation hides more than it reveals. Women are being pushed into unpaid or poorly paid work, especially in agriculture and household enterprises, while real earnings are falling. This suggests that India’s growth story is not translating into dignified employment for women. For true gender equality, the focus must shift from mere participation numbers to quality, security, and remuneration of women’s work. Only then will women’s economic empowerment become a reality.

    PYQ Relevance

    [UPSC 2023] Distinguish between ‘care economy’ and ‘monetized economy’. How can the care economy be brought into a monetized economy through women empowerment?

    Linkage: The article highlights women’s shift from domestic duties to unpaid helper roles, directly linking the care economy to the challenge of integrating it into the monetized economy through women’s empowerment.

  • Remission of Duties and Taxes on Exported Products (RoDTEP) Scheme

    Why in the News?

    The Government has extended the Remission of Duties and Taxes on Exported Products (RoDTEP) Scheme until March 31, 2026, providing relief and policy certainty to exporters.

    About the RoDTEP Scheme:

    • Launch & Context: Introduced on 1 January 2021 under the Foreign Trade Policy 2015–20, replacing the Merchandise Exports from India Scheme (MEIS) after India lost a case at the World Trade Organisation (WTO).
    • Administration: Managed by the Department of Revenue, Ministry of Finance, and implemented via the Central Board of Indirect Taxes and Customs (CBIC).
    • Objective: Refund hidden domestic taxes/duties on exports to ensure goods leave the country free of embedded levies, enhancing competitiveness and ensuring WTO compliance.
    • Coverage: Applicable to all Indian exporters (manufacturers and merchants) including SEZs, Export Oriented Units (EOUs), Advance Authorisation (AA) holders, and Domestic Tariff Area (DTA) units.
    • Timeline: Initially valid till 5 February 2025, restored in May 2025 for AA, EOU, and SEZ exports after industry lobbying, and now extended till 31 March 2026.

    Key Features:

    • Hidden Taxes Covered: Refunds duties such as electricity duty, mandi tax, fuel charges in transport, and local cesses.
    • Rebate Mechanism: Calculated as a percentage of the Free on Board (FOB) value of exports.
    • Refund Mode: Benefits disbursed as electronic scrips (e-scrips), stored in CBIC’s digital ledger.
    • Use of E-Scrips: Can be utilised to pay basic customs duty or transferred to other importers.
    • Sectoral Priority: Focus on labour-intensive industries like textiles, handicrafts, leather, etc.
    • Exclusion: Re-exported goods are not eligible under RoDTEP.
    • Budgetary Control: Operates strictly within annual budget allocations, as clarified by DGFT.
    • Policy Certainty: Extension till 2026 ensures stability for exporters facing global trade headwinds.
    [UPSC 2020] With reference to the international trade of India at present, which of the following statements is/are correct?

    1.  India’s merchandise exports are less than its merchandise imports.

    2. India’s imports of iron and steel, chemicals, fertilizers and machinery have decreased in recent years.

    3. India’s exports of services are more than its imports of services.

    4. India suffers from an overall trade/current account deficit.

    Select the correct answer using the code given below:

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

     

  • Geoengineering Proposals for Polar Regions found flawed

    Why in the News?

    A University of Exeter study found five major polar geoengineering methods ineffective and risky, failing criteria for responsible climate intervention.

    Geoengineering in Polar Regions: Study Findings

    Method Description Intended Benefit Key Findings & Limitations
    Stratospheric Aerosol Injection (SAI) Artificially releasing aerosols (SO₂, sulphur particles, TiO₂, CaCO₃) into the stratosphere to reflect sunlight. Reduce surface temperatures by blocking solar radiation.
    • Ineffective in polar winters (no sunlight) and of limited use in summers (ice already highly reflective).
    • Sudden termination can cause “termination shock” with rapid global warming.
    • Potential to disrupt global weather cycles, harming food and water security.
    • No global governance on costs or liability. Estimated cost: $55M/year per country (if 30 nations share).
    Sea Curtains / Sea Walls Massive buoyant barriers anchored to seafloor to block warm currents from reaching ice sheets. Slow melting of glaciers by insulating them from warm water.
    • Technically near-impossible in remote seas like Amundsen (Antarctica).
    • Extremely high costs — >$1 billion/km.
    • Threatens marine circulation, fish migration, and nutrient cycles.
    • Installation in harsh polar seas only possible for few months a year; requires custom-built ships.
    • Risk of toxic materials leaching into ocean.
    Sea Ice Management (Microbeads) Sprinkling glass microbeads over sea ice to increase albedo (reflectivity) and thicken ice. Preserve summer ice, slow down warming.
    • Requires 360M tonnes of beads annually — equal to world’s plastic production.
    • Major logistical and emissions challenges.
    • Beads dissolve quickly, reducing effectiveness.
    • Some studies show beads absorb sunlight, causing net warming.
    • Costly: $500B/year for Arctic deployment; requires 100M pumps, huge energy draw.
    Basal Water Removal Pumping subglacial meltwater from under Antarctic glaciers. Reduce glacier sliding, thus slowing sea-level rise.
    • Flawed logic: subglacial water is constantly replenished by frictional/geothermal heating.
    • Highly emissions-intensive and energy-consuming.
    • Requires continuous monitoring, maintenance, and heavy infrastructure.
    • Long-term sustainability questioned.
    Ocean Fertilisation Adding nutrients (e.g., iron) to stimulate phytoplankton growth, enhancing CO₂ absorption. Sequester more carbon in oceans.
    • No control over which phytoplankton species dominate, creating food chain imbalances. 
    • Could harm marine biodiversity and alter global nutrient cycles.
    • Needs deployment at massive, impractical scale.
    • Risk of side-effects outweighs uncertain benefits.

     

    [UPSC 2020] Consider the following activities:

    1. Spreading finely ground basalt rock extensively on farmlands

    2. Increasing the alkalinity of oceans by adding lime

    3. Capturing carbon dioxide released by various industries and pumping it into abandoned subterranean mines in the form of carbonated waters

    How many of the above activities are often considered and discussed for carbon capture and sequestration?

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