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Subject: Conservation & Mitigation

1. Conservation Progs.
2. Worldwide initiatives
3. Mitigation Strategies
4. Conventions and Protocols

  • [pib] What is Operation Olivia?

    Why in the News?

    As of February 2025, the Indian Coast Guard (ICG) protected a record 6.98 lakh Olive Ridley turtles during their mass nesting at the Rushikulya river mouth in Odisha.

    About Operation Olivia:

    • Launch: Operation Olivia is an annual conservation mission by the Indian Coast Guard, started in the early 1980s.
    • Main Objective: It aims to protect Olive Ridley turtles during their nesting season, from November to May.
    • Primary Locations: The operation focuses on Odisha’s coast, especially Gahirmatha Beach, Devi River mouth, and Rushikulya River mouth.
    • Turtle Nesting Scale: Over 8 lakh turtles arrive annually at these sites to nest.
    • Surveillance Efforts: The Coast Guard has conducted more than 5,387 surface patrols and 1,768 aerial missions.
    • Community Engagement: Fishermen are encouraged to use Turtle Excluder Devices (TEDs) that allow turtles to escape fishing nets.

    About Olive Ridley Turtles:

    • Appearance: Named for their olive-green shell, or carapace.
    • Diet: They are Omnivores, though feeding mainly on jellyfish, crustaceans, and molluscs.
    • Nesting Behaviour: Known for Arribada, a phenomenon where thousands of females come ashore simultaneously to lay eggs.
    • Habitat Range: Found in warm waters of the Pacific, Atlantic, and Indian Oceans.
    • Major Nesting Sites in India:
      • Gahirmatha Marine Sanctuary, Odisha (largest site)
      • Devi River mouth (discovered in 1981)
      • Rushikulya River mouth (discovered in 1994)
    • Protection Status:
      • IUCN Red List: Listed as Vulnerable.
      • CITES: Included in Appendix I, banning international trade.
      • Wildlife Protection Act, 1972: Listed under Schedule I, offering the highest legal protection in India.
    [UPSC 2002] The sea coast of which one of the following states has become famous as a nesting place for the giant Olive Ridley turtles from South America?

    Options: (a) Goa (b) Gujarat (c) Odisha* (d) Tamil Nadu

     

  • Mahadayi Water Dispute

    Why in the News?

    A protest has erupted in Goa after a scientific paper on water availability and diversion in the Mahadayi basin reignited its long-standing dispute with Karnataka.

    Mahadayi Water Dispute

    About the Mahadayi River:

    • Origin: The Mahadayi River (Mhadei in Goa) originates in Bhimgad, Karnataka, in the Western Ghats.
    • Length and Flow: It flows 81 km, passing through Karnataka (35 km), Goa (45 km), and Maharashtra (1 km) before reaching the Arabian Sea.
    • Basin Area: Covers 2,032 sq km—78% in Goa, 18% in Karnataka, and 4% in Maharashtra.
    • Significance: Forms the Mandovi River, essential for drinking water, agriculture, and navigation in Goa.
    • Tributaries: Kalasa Nala, Surla Nala, Haltar Nala, Poti Nala, Mahadayi Nala, Pansheer Nala, Bail Nala, Andher Nala and many more. It has a catchment area of 2032 sq.km.
    • Topography: Elevation ranges between < 0m and > 980m w.r.t Mean Sea Level, slope of the catchment varies up to 150%. Very high slope we observed in the Ghats (Braganja Ghats).
    • Waterfalls: Variations in the terrain has led to formation of various water falls such as the Doodhsagar falls,Vajra poha falls etc.
    • Ecology: Supports rich biodiversity, including the Salim Ali Bird Sanctuary.
    • Mineral Ores found: Iron, limestone, bauxite, quartz, limestone, sand, clay, lime shell, Manganese, Asbestos, Mica, Lead, Cadmium.

    Mahadayi Water Dispute:

    • Karnataka’s Project: Proposed the Kalasa-Banduri Nala to divert water to the Malaprabha basin.
    • Tribunal Setup: The Mahadayi Water Disputes Tribunal (2010) addressed disagreements.
    • 2018 Verdict:
      • Karnataka: 13.42 tmcft (1.72 from Kalasa, 2.18 from Bhandura).
      • Goa: 24 tmcft (plus 9.395 tmcft for existing use).
      • Maharashtra: 1.33 tmcft.
    • Concerns: Goa feared impacts on Mandovi navigation; the tribunal cited tidal flow ensures stability.
    • Legal Status: Both states have challenged the verdict in the Supreme Court.

    Controversy Over CSIR-NIO Report:

    • Study Findings: Claimed Karnataka’s diversions would have minimal impact on Goa’s water or estuarine navigation.
    • Institutions: Report authored by CSIR-NIO (Goa) and INCOIS (Hyderabad).
    • Recommendations: Suggested check dams and a Tillari-style agreement for shared water use and ecological balance.

    Tap to read more about Interstate Water Disputes in India.

    [UPSC 2013] Constitutional mechanisms to resolve the inter-state water disputes have failed to address and solve the problems. Is the failure due to structural or process inadequacy or both? Discuss.

     

  • India assembles First Chromosome-Level Genome of the Yak

    Why in the News?

    Specialists from the Indian Council of Agricultural Research (ICAR) have successfully assembled the first-ever chromosome-level genome of the Indian yak (Bos grunniens).

    India assembles First Chromosome-Level Genome of the Yak

    About the Indian Yak (Bos grunniens):

    • The Indian yak, often referred to as the ‘ship of the Himalayas’, plays a crucial role in the high-altitude economies of India.
    • Features: It is known for its resilience and adaptability to extreme environments. It provides meat, milk, and manure and is a vital mode of transportation.
    • Habitat: It inhabits the regions above 7,000 feet in Ladakh, Sikkim, Arunachal Pradesh, and Himachal Pradesh.
    • Conservation Status: It is assessed as Vulnerable under the IUCN Red List and included in CITES Appendix I and Schedule I in the Indian Wildlife (Protection) Act, 1972.

    Significance of the Research:

    • Mapping Method: The study used long-read sequencing and advanced bioinformatics to map yak genes with high precision.
    • Feature Identification: The genome will help identify genes for cold tolerance, disease resistance, and milk production.
    • Comparative Applications: It will allow comparative studies with other bovine species to discover valuable genetic traits (alleles).
    • Breeding and Conservation: The data will support better breeding strategies and the creation of conservation plans for yaks.
    • Livelihood Impact: This research supports sustainable development and could improve the livelihoods of Himalayan yak herders through targeted livestock improvements.
    [UPSC 2017] According to the Wildlife (Protection) Act, 1972, which of the following animals cannot be hunted by any person except under some provisions provided by law?

    1. Gharial 2. Indian wild ass 3. Wild buffalo

    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*

     

  • [13th May 2025] The Hindu Op-ed: How is shipping industry tackling emissions?

    PYQ Relevance:

     [UPSC 2022] Discuss global warming and mention its effects on the global climate. Explain the control measures to bring down the level of greenhouse gases which cause global warming, in the light of the Kyoto Protocol, 1997.

    Linkage: The shipping industry’s contribution to GHG emissions (approximately 1 billion metric tonnes annually, about 2.8% of total global emissions) and the IMO’s efforts to reduce these emissions to align with goals like the Paris Agreement. The question’s focus on international climate agreements (Kyoto Protocol) is relevant to the IMO’s regulatory efforts.

     

    Mentor’s Comment: The adoption of the Net Zero Framework, which is based on Market-Based Measure (MBM) by the International Maritime Organization (IMO) to regulate and reduce greenhouse gas (GHG) emissions from international shipping, marking a historic shift in global climate governance. It highlights the geopolitical negotiations, competing national interests, and the struggle to balance environmental effectiveness with economic fairness in formulating a global carbon levy on shipping emissions.

    Today’s editorial talks about regulation of greenhouse gas (GHG) emissions from international shipping.  This topic is useful for GS Paper II (International Relations and Policy Making) and GS Paper III (Environment).

    _

    Let’s learn!

    Why in the News?

    At the Marine Environment Protection Committee (MEPC-83) session of the IMO, a major step was taken by approving a new system to cut shipping emissions.

    What is the International Maritime Organisation (IMO)? 

    The International Maritime Organization (IMO) is a United Nations specialized agency responsible for regulating international shipping, promoting maritime safety, environmental protection, legal matters, and technical cooperation among member states.

    Why is it a landmark step? 

    • First Legally Binding Global Emission Levy: Shipping is the first industry with a mandatory, global emissions levy under the MARPOL treaty—unlike aviation (ICAO) or manufacturing, which follow voluntary or regional norms.
    • Equity Through CBDR-RC: The mechanism incorporates equity—ZNZ fuel users are rewarded, while underperformers bear the financial burden, aligning with developing countries’ interests.
    • Clear, Time-Bound Targets: IMO sets concrete milestones: 40% cut in carbon intensity by 2030, 70% by 2040, and net-zero by 2050—unlike ICAO’s vague goals.

    What were the challenges while taking this step?

    • Resisted by the Oil-Exporting Nations: Countries like Saudi Arabia, which depend heavily on fossil fuel exports, opposed stringent carbon levies, fearing these would harm their economies. They resisted the transition to green fuels, advocating for minimal changes.
    • Developed vs. Developing Countries: Developed nations like the EU supported aggressive emission reductions, while developing countries like China pushed for a market-driven approach to preserve competitiveness and avoid excessive financial burdens.

    How is the shipping industry tackling emissions as per the IMO?

    • Reduction of GHG emissions: The International Maritime Organization (IMO) has implemented measures like the Energy Efficiency Design Index and the Ship Energy Efficiency Management Plan to reduce carbon emissions from ships.
    • Targets for carbon intensity: The IMO has set a goal to reduce carbon intensity by at least 40% by 2030 (compared to 2008 levels) and 70% by 2040, with the ultimate aim of achieving net-zero emissions by 2050.
    • Green technologies and fuel alternatives: The IMO is pushing for cleaner fuels and innovative technologies for emissions reduction, including efforts in alternative fuels such as green hydrogen.

    What is the Net Zero Framework adopted by the IMO?

    The Net Zero Framework is a Market-Based Measure (MBM) to reduce emissions in the shipping industry. It aims to implement a mandatory emissions levy on global shipping to ensure that the sector meets net-zero targets by 2050.

    How would it work? 

    • Emission-Based Levy with Incentives: Ships emitting high greenhouse gases must pay a carbon levy, while those using Zero or Near-Zero (ZNZ) fuels receive financial rewards or credits. Eg: A ship using green hydrogen below the IMO’s emission threshold earns surplus credits, reducing its future levy.
    • Tiered Compliance via GHG Fuel Standard (GFS): Ships are classified based on fuel efficiency and emission levels. Underperformers must purchase remedial units, while high performers gain tradable surplus units. Eg: A vessel exceeding emission targets must buy units from a cleaner ship, creating a carbon market within global shipping.

    What is the limit on carbon emissions?

    • As per IMO reward thresholds:
      • Until 2034: The carbon limit is 19.0 g CO₂e/MJ
      • From 2035 onwards: It tightens to 14.0 g CO₂e/MJ

    How will the Market-Based Measure (MBM) framework impact India’s maritime sector and trade costs by 2030 and 2050?

    • Trade Costs: The MBM framework is likely to increase shipping costs due to carbon pricing and fuel surcharges, making Indian exports less competitive. Eg: Textile and agricultural exports from India to Europe may become costlier by 2030 due to EU’s Emission Trading System (ETS) expansion to maritime transport.
    • Equity Concerns: Uniform carbon levies do not consider developmental disparities, placing a higher burden on countries like India with limited historical emissions. Eg: India has argued at the IMO that MBMs should reflect Common But Differentiated Responsibilities (CBDR), as it is still building infrastructure and trade capacity.
    • Green Shipping Transition: To comply with decarbonization norms by 2050, India must shift to alternative fuels (e.g., green hydrogen, ammonia) and upgrade port infrastructure, requiring massive investments. Eg: Jawaharlal Nehru Port Trust may need to install green bunkering facilities and electrified cargo handling systems.
    • Technological and Financial Gaps: Lack of access to clean technology and climate finance may hinder India’s ability to transition smoothly, increasing dependence on foreign solutions. Eg: Advanced nations may dominate green shipbuilding, while Indian shipyards lag due to lack of R&D support and capital.
    • Opportunity for Green Growth: If supported with international finance and technology transfer, MBMs can stimulate domestic innovation and green job creation in maritime sectors. Eg: India’s “Green Ports” initiative could align with MBM goals and boost employment in clean energy, retrofitting, and logistics.

    Way forward: 

    • Differentiated Levy Design: IMO should adopt a flexible carbon pricing model that reflects Common But Differentiated Responsibilities (CBDR), allowing developing countries like India room to grow while contributing to climate goals. Eg: Tiered levy based on national capacities and emission intensity.
    • Technology Transfer & Climate Finance: Establish dedicated funding mechanisms for green shipping innovation, infrastructure upgrades, and capacity building in developing nations. Eg: An IMO-led global Green Maritime Fund supported by developed countries.

  • India’s rising e-waste, the need to recast its management

    Why in the News?

    India has overhauled its e-waste governance through the E-Waste (Management) Rules, 2022, which came into force on April 1, 2023, replacing the 2016 version. These rules mark a major policy shift to tackle India’s rapidly growing e-waste crisis.

    How Does the New EPR Framework Work?

    • Mandatory Registration: All manufacturers, producers, refurbishers, and recyclers must register with the Central Pollution Control Board (CPCB) through an online portal.
    • EPR Targets: These entities must meet specific collection and recycling targets, as set by the CPCB.
    • Liability for Non-compliance: Failure to meet targets invokes environmental compensation and penalties.

    What is the role of EPR floor pricing in e-waste management?

    • Ensures Fair Returns to Formal Recyclers: EPR floor pricing guarantees minimum compensation for authorized recyclers, making formal recycling economically viable and discouraging unsafe informal practices. Eg: A certified recycler adopting advanced e-waste extraction technologies is assured stable earnings, promoting compliance and expansion.
    • Reduces Informal Sector Dominance: By offsetting the cost advantage of informal recyclers, floor pricing shifts e-waste processing to the formal sector, where health and environmental standards are enforced. Eg: In India, 95% of e-waste is handled informally; floor pricing helps shift this to regulated channels.
    • Boosts Circular Economy and Material Recovery: Stable pricing encourages recyclers to focus on resource recovery—such as copper, gold, and rare metals—rather than mere disposal. Eg: Proper recycling of circuit boards in formal facilities helps recover precious metals worth crores, reducing raw material imports.

    What are the economic and social consequences of poor e-waste management?

    • Economic loss from pollution: Over $10 billion lost annually due to pollution from toxic e-waste processing.
    • Social cost: Informal processing results in $20 billion in social loss, affecting women and children, whose average lifespan is under 27 years.
    • Lost revenue and metals: India forfeits â‚č80,000 crore annually in metal value and $20 billion in tax revenue due to untracked, cash-based operations.
    • Health impacts: Open incineration and use of cyanide and sulphuric acid cause air, water, and soil pollution, compounding public health crises.

    How does stable pricing support formal recycling?

    • Ensures Financial Viability for Formal Recyclers: A minimum (floor) price for EPR certificates guarantees fair compensation, encouraging recyclers to invest in safe, modern technologies. Eg: Certified recyclers can recover precious metals like gold and copper efficiently with advanced equipment, making operations economically viable.
    • Discourages Hazardous Informal Practices: Stable pricing removes the informal sector’s cost advantage, shifting recycling away from unsafe, illegal methods. Eg: With assured returns, recyclers prefer compliance over risky open burning and acid-leaching methods that dominate 95% of the sector.
    • Drives Compliance and Investment: Predictable prices create trust in the system, helping producers meet EPR obligations and promoting infrastructure development.

    What are the challenges? 

    • Dominance of the Informal Sector: A large share of e-waste in India is processed by the informal sector using hazardous and unsafe methods like acid baths and open burning. Eg: In Seelampur (Delhi), a major informal e-waste hub, workers dismantle electronics without protection, exposing themselves to toxic substances like lead and mercury.
    • Low Consumer Awareness and Participation: Many consumers are unaware of proper e-waste disposal methods, leading to hoarding, landfilling, or selling to unregulated recyclers. Eg: In cities like Bengaluru and Mumbai, residents often discard electronics with household waste or sell them to local kabadiwalas despite having formal collection centers.

    Way forward: 

    • Strengthen Awareness and Consumer Participation: Promote widespread consumer education on e-waste disposal through campaigns and incentives for responsible recycling, ensuring more e-waste is directed to formal, safe channels.
    • Enhance Infrastructure and Enforcement of EPR: Develop advanced e-waste recycling infrastructure and strictly enforce EPR compliance to ensure producers meet recycling targets and transition e-waste processing to the formal sector.

    Mains PYQ:

    [UPSC 2023] What is the status of digitalization in the Indian economy? Examine the problems faced in this regard and suggest improvements.

    Linkage: India’s growing e-waste problem is linked to its fast digital growth and greater use of electronic gadgets. This issue mainly relates to the economy but also highlights how digitalisation is a key reason behind the rise in e-waste.

  • Species in news: Indian Grey Wolf

    Why in the News?

    Indian Grey Wolves in the Kadbanwadi Grasslands in Pune District are exposed to threats from local dog populations, such as Canine Distemper Virus (CDV), rabies, and canine parvovirus.

    Indian Grey Wolf

    About the Indian Grey Wolf (Canis lupus pallipes):

    • The Indian Grey Wolf is a subspecies of the Grey Wolf, found in India, Southwest Asia, and parts of the Middle East.
    • It has a brownish-grey coat with black and white markings and is less vocal, living in small packs of 2 to 6 members.
    • This wolf is nocturnal, meaning it hunts mainly at night, preying on small animals like chinkaras (gazelles), rodents, and sometimes livestock.
    • It lives in scrublands, grasslands, and semi-arid regions, and prefers warm climates.
    • As an apex predator of the grasslands, it plays a vital role in the ecosystem by controlling the population of herbivores and smaller predators.
    • The species is under threat due to habitat loss, disease from stray dogs, crossbreeding, and human conflict.
    • Its conservation status is critical:
      • IUCN: Endangered
      • CITES: Appendix I (highest international protection)
      • Wildlife Protection Act, 1972: Schedule I (maximum legal protection)

    Do you know?

    • The only protected area specifically dedicated to Indian grey wolves in India is the Mahuadanr Wolf Sanctuary in Latehar district, Jharkhand.
    • This sanctuary was established in 1976 to protect the wolf population and is part of the Palamau Tiger Reserve.

     

    [UPSC 2002] Which one of the following is monogamous?

    Options: (a) Wolf* (b) Walrus (c) Seal (d) Deer* (Answer is disputed)

     

  • World’s Longest Banana Infructescence Found in Andaman

    World’s Longest Banana Infructescence Found in Andaman

    Why in the News?

    A species of wild banana, Musa indandamanensis, endemic to the Andaman and Nicobar Islands, has set a world record with an infructescence (fruit bunch axis) measuring 4.2 metres — the longest ever recorded among banana species globally.

    About the Musa indandamanensis:

    • Musa indandamanensis is a wild banana species that is endemic to the Andaman and Nicobar Islands.
    • It was first discovered in 2012 near the Krishna Nala reserve forest in Little Andaman and officially described in 2014.
    • The species was later rediscovered in Campbell Bay, located in the Nicobar Islands.
    • The discovery was led by Dr. Lal Ji Singh, Head of the Botanical Survey of India’s Andaman and Nicobar Regional Centre.
    • Due to its limited natural range and habitat vulnerability, it is listed as Critically Endangered by IUCN.

    Notable Features:

    • The species holds the world record for the longest banana infructescence, measuring 4.2 metres.
    • The plant typically reaches a height of about 11 metres, with stem girth varying by location: under 100 cm in Little Andaman and around 110 cm in Campbell Bay.
    • It bears golden yellow to orange fruits, which ripen into a golden-orange pulp containing many irregular-shaped seeds.
    • The plant thrives in moist tropical forests, typically near waterfalls and streams.
    • It is considered a valuable genetic resource for developing drought-resistant, disease-tolerant, and high-yielding banana varieties.
    • Specimens are showcased in botanical institutions such as the Indian Museum in Kolkata and the Andaman and Nicobar Regional Centre.
    • For ex-situ conservation, saplings have been planted in botanical gardens in Howrah, Prayagraj, and Port Blair.
    [UPSC 2016] Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp. In which part of India has it been discovered?

    Options: (a) Andaman Islands* (b) Anaimalai Forests (c) Maikala Hills (d) Tropical rain forests of northeast

     

  • It is time to protect India’s workers from the heat

    Why in the News?

    Millions of informal workers in Indian cities are still suffering the most because Heat Action Plans are poorly designed.

    What are the key gaps in current Heat Action Plans for informal workers?

    • Lack of Specific Focus on Informal Workers: Most Heat Action Plans do not explicitly identify or address the unique needs of informal workers. Eg: NDMA’s 2019 heatwave guidelines mention “outdoor workers” broadly, without specific measures for vendors, construction workers, or waste pickers.
    • Absence of Occupational Safety Protocols: There are no provisions for safe working hours, rest breaks, hydration, or emergency response for heat stress. Eg: State-level HAPs often do not mandate rest periods or shaded areas for those working under the sun, unlike Odisha which mandates halts in outdoor work during peak heat hours.
    • Short-term and Crisis-oriented Planning: Most HAPs are activated only during summer months and lack long-term strategies to tackle recurring heatwaves. Eg: City-level HAPs like those in Delhi focus on public awareness during heat alerts but don’t invest in permanent cooling infrastructure.
    • Inadequate Coordination Between Departments: Ministries and departments (Labour, Urban Affairs, Health) work in silos, leading to disjointed efforts. Eg: Urban development plans rarely consult labour departments, leaving out worker welfare components like cooling shelters at work sites.
    • No Budgetary Provision or Worker Participation: Most HAPs are underfunded and formulated without involving worker collectives or unions. Eg: Unlike Ahmedabad’s more inclusive model that adjusted work hours and created shaded rest areas, many cities fail to allocate funds or consult informal worker groups.

    Why are informal workers most vulnerable to heatwaves?

    • Prolonged Exposure to Outdoor Heat: Informal workers often work in open, unshaded environments without protective infrastructure. Eg: Street vendors and construction workers spend long hours on roads or open sites under direct sunlight, increasing the risk of heatstroke and dehydration.
    • Lack of Social and Health Protection: Most informal workers are not covered under formal health insurance or welfare schemes. Eg: Waste pickers or rickshaw pullers facing heat exhaustion rarely get access to medical care or income support during extreme weather conditions.
    • No Control Over Work Conditions: Informal work lacks regulated hours, rest breaks, or heat safety norms. Eg: Gig workers or daily wage labourers often continue working during peak heat hours to avoid income loss, further risking their health.

    Who should be included in drafting worker-focused HAPs?

    • Informal Worker Collectives and Unions: These groups bring first-hand knowledge of occupational challenges and practical needs. Eg: Street vendor associations can guide the placement of shaded stalls or cooling zones in high-traffic market areas.
    • Local Civil Society and NGOs: They have ground-level experience working with vulnerable communities and can ensure inclusive planning. Eg: NGOs working with waste pickers can help identify priority locations for hydration points and rest shelters.
    • Urban Local Bodies and Municipal Officials: City planners and officials must coordinate resources and integrate worker needs into official frameworks. Eg: Municipal corporations can designate public spaces like bus depots or community halls as cooling centers for workers.

    Where should cooling zones be set up for maximum worker benefit?

    • High-Density Work Areas: Install cooling zones where informal workers are concentrated and exposed to heat. Eg: Labour chowks, construction sites, and industrial zones where daily wage workers gather and work outdoors.
    • Public Transport Hubs and Markets: Busy areas with long waiting times or heavy footfall offer strategic relief points. Eg: Bus stations, metro exits, and wholesale markets where street vendors and rickshaw pullers operate.
    • Slum Clusters and Informal Settlements: Set up community cooling centres where workers live in poorly ventilated, heat-trapping environments. Eg: Urban slums lacking trees or open spaces, where indoor heat stress is high during nights and afternoons.

    How can cities integrate heat resilience into governance and planning? (Way forward)

    • Embed Heat-Safety Norms in Urban Planning Frameworks: Include heat adaptation measures in master plans, building bye-laws, and zoning regulations. Eg: Mandating cool roofs, passive ventilation, and shaded pathways in all new public infrastructure projects.
    • Retrofit Informal Workspaces for Thermal Comfort: Upgrade existing markets, labour hubs, and waste collection zones with heat-resilient designs. Eg: Installing reflective roofing, shade nets, and drinking water stations in street vendor zones.
    • Establish Interdepartmental Coordination and Accountability: Create dedicated roles (like a heat officer) and inter-ministerial task forces for climate and labour. Eg: A city-level heat officer coordinating between health, labour, and urban departments to ensure timely responses during heatwaves.

    Mains PYQ:

    [UPSC 2013] Bring out the causes for the formation of heat islands in the urban habitat of the world.

    Linkage: It is time to protect India’s workers from the heat” discusses the growing crisis of extreme heat in Indian cities and its severe impact on urban informal workers.

  • Total Allowable Catch (TAC) in Fishing

    Why in the News?

    A recent legal dispute between the US and Russia has brought the issue of Total Allowable Catch (TAC) into the spotlight.

    About Total Allowable Catch (TAC):

    • TAC refers to the maximum quantity of a specific fish species that can be legally harvested in a defined period.
    • It is established to prevent overfishing and ensure sustainable fish populations.
    • These limits are essential for maintaining ecological balance and supporting long-term fishing industries.

    Various Laws Governing TAC:

    • TACs are set by international fisheries management organizations like:
      • FAO (Food and Agriculture Organization).
      • RFMOs (Regional Fisheries Management Organizations) for shared or migratory fish stocks.
    • European Union (EU): TACs are managed under the Common Fisheries Policy (CFP), which sets quotas for member states based on scientific advice. Landing obligations ensure that all catches are counted against quotas, preventing waste.
    • India: India enforces a seasonal fishing ban in its Exclusive Economic Zone (EEZ) for 61 days to protect breeding fish. This ban serves as a TAC equivalent of zero for specific periods, supporting fish stock regeneration.
    • New Zealand: The Fisheries Act sets TACs for various stocks and specifies catch limits in terms of weight or numbers, updated by official notices.
    [UPSC 2013] The most important fishing grounds of the world are found in the regions where:

    Options: (a) Warm and cold atmospheric currents meet (b) Rivers drain out large amounts of freshwater into the sea (c) Warm and cold oceanic currents meet* (d) continental shelf is undulating.

     

  • Microplastics disrupting the Ocean’s Carbon Cycle

    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