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Subject: Environment

  • Sunabeda Wildlife Sanctuary 

    Why in the News?

    Sunabeda Wildlife Sanctuary has been declared Maoist free and is emerging as a key leopard habitat, with forest officials estimating over 70 leopards in the sanctuary.

    What does “Maoist free” mean?

    Maoist free refers to an area that has been cleared of active Maoist (Left Wing Extremist) presence and where no operational influence, camps, or armed activity of Maoist groups remains.

    About Sunabeda Wildlife Sanctuary

    • Located in Odisha, in Nuapada district
    • Declared a Wildlife Sanctuary in 1983
    • Adjoins Udanti Wildlife Sanctuary and Sitanadi Wildlife Sanctuary
    • Forms part of an inter state forest landscape between Odisha and Chhattisgarh

    Physical Features

    • Terrain includes plateaus, deep canyons, and 11 waterfalls
    • Acts as catchment of the Jonk River
    • Jonk River is a tributary of the Mahanadi River
    • An irrigation dam constructed across the river
    • Vegetation: Dominated by Dry Deciduous Tropical Forests

    Prelims Pointers

    • Sunabeda lies in western Odisha
    • Declared sanctuary in 1983
    • Shares boundary with Udanti Sitanadi landscape
    • Part of Mahanadi river basin via Jonk River
    • Known for leopard population recovery after Maoist decline
    [2024] Consider the following statements: 

    1. Lions do not have a particular breeding season. 

    2. Unlike most other big cats, cheetahs do not roar. 

    3. Unlike male lions, male leopards do not proclaim their territory by scent marking. 

    Which of the statements given above are correct? 

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

  • Vishwamitri River  

    Why in the News?

    The Vishwamitri River, flowing through Vadodara in Gujarat, has drawn attention due to the presence of a large urban population of mugger crocodiles, earning it the title India’s Crocodile River.

    About Vishwamitri River

    • A small non perennial river in eastern Gujarat
    • Origin: Western and southern slopes of the Pavagadh Hills
    • Course: Flows westward through Vadodara city
    • Tributaries: Dhadar and Jambuva
    • Outfall: Arabian Sea via the Gulf of Khambhat
    • Total length: 200 km
    • Characterised by highly meandering and sinuous course

    Biodiversity Along the River

    • Mammals: Porcupine, Indian civet, Jungle cat
    • Reptiles: Cobras, Pythons, Checkered keelback, Bengal monitor
    • Supports a major population of Mugger crocodile

    Mugger Crocodiles 

    • Scientific name Crocodylus palustris
    • Distribution: Iran to Bangladesh, Nepal to Sri Lanka
    • In India found in 15 states
    • Also called Indian crocodile
    • 2025 census recorded 442 muggers
    • Found within a 21 km urban stretch in Vadodara
    • Freshwater rivers, lakes, ponds, hill streams
    • Can survive in coastal saltwater lagoons
    • IUCN Red List: Vulnerable
    [2017] If you want to see gharials in their natural habitat, which one of the following is the best place to visit? 

    (a) Bhitarkanika Mangroves 

    (b) Chambal River 

    (c) Pulicat Lake 

    (d) Deepor Beel

  • Shettihalli Wildlife Sanctuary  

    Why in the News?

    The Forest Minister of Karnataka recently visited Shettihalli Wildlife Sanctuary amid controversy over a proposal to reduce the sanctuary boundary.

    About Shettihalli Wildlife Sanctuary

    • Located in Karnataka, in Shimoga (Shivamogga) district
    • Lies along the Tunga River
    • Tunga Anicut Dam situated within the sanctuary
    • Provides habitat for otters and water birds
    • Mandagadde Bird Sanctuary forms part of Shettihalli
    • Mandagadde is an island nesting site in the Tunga River

    Prelims Pointers

    • Shettihalli lies on the Tunga River
    • Mandagadde Bird Sanctuary is part of it
    • Presence of displaced human settlements is a management challenge
    • Supports rich avifauna and large mammals
    • Forest types range from dry deciduous to evergreen
    [2019] Consider the following pairs: 

    Famous place :    River 

    1. Pandharpur :    Chandrabhaga 

    2. Tiruchirappalli : Cauvery 

    3. Hampi :             Malaprabha

    Which of the pairs given above are correctly matched? 

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

  • Rare Rusty spotted Cat sighted in Rajasthan 

    Why in the News?

    A Rusty spotted Cat, one of the smallest wild cats in the world, was recorded alive for the first time in the Shergarh Sanctuary of Baran district, Rajasthan, through camera trap evidence in January 2026.

    About Rusty spotted Cat

    • Among the world’s smallest felines
    • Nocturnal, shy, and solitary in nature
    • Comes together only during breeding season
    • Primarily a carnivore
    • Plays an ecological role in seed dispersal through fruits sticking to its fur

    Conservation Status

    • Near Threatened (NT) by the International Union for Conservation of Nature (IUCN)
    • Faces threats from habitat loss, road kills, and low detectability

    Habitat and Distribution

    • Forests and scrublands
    • Found in Uttar Pradesh, Gujarat, Maharashtra, and South India
    • First live record in the Hadoti region of Rajasthan
    • Earlier road kill recorded in Shahabad area of Baran district in December 2023

    About Shergarh Sanctuary

    • Located in Baran district
    • Part of the Hadoti region
    • Dry deciduous forest ecosystem
    • Increasing use of camera trapping for wildlife monitoring
    [2023] Consider the following fauna: 

    1. Lion-tailed Macaque 

    2. Malabar Civet 

    3. Sambar Deer 

    How many of the above are generally nocturnal or most active after sunset? 

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

  • Carbon Border Adjustment Mechanism (CBAM)

    Why in the news?

    The European Union’s (EU) Carbon Border Adjustment Mechanism (CBAM) (CBAM) is a, as of January 1, 2026, fully implemented policy designed to levy a tax on carbon-intensive imports, such as steel, cement, aluminum, fertilizers, electricity, and hydrogen. This is applied to prevent “carbon leakage”. It ensures foreign producers pay a similar carbon price to EU firms, aiming to encourage global. It is in the news as it enters its decisive phase ahead of 2026, raising concerns for India’s carbon-intensive exports to the EU. Its relevance has increased after the conclusion of the India-EU Free Trade Agreement, which includes a non-discrimination (forward-MFN) clause on CBAM but does not remove the regulation itself.

    What is the Carbon Border Adjustment Mechanism (CBAM)?

    1. Carbon Pricing Instrument: Applies a carbon price on imports equivalent to the EU carbon price under the ETS.
    2. Leakage Prevention Tool: Prevents relocation of carbon-intensive production to jurisdictions with weaker climate policies.
    3. Climate-Trade Linkage: Integrates climate objectives directly into customs and trade regulation.
    4. WTO Compatibility Claim: Structured to mirror domestic carbon pricing to avoid discrimination.

    How Does CBAM Function in Practice?

    1. CBAM Certificates: Requires EU importers to purchase certificates reflecting embedded emissions.
    2. Price Benchmarking: Certificate prices linked to EU ETS allowance auction prices.
    3. Annual Compliance: Importers must declare embedded emissions and surrender certificates annually.
    4. Carbon Cost Deduction: Allows deduction if an equivalent carbon price is already paid in the exporting country.
    5. Equivalence Provision: Exempts exporters from jurisdictions with comparable carbon pricing regimes.

    What is the Implementation Timeline of CBAM?

    1. Transitional Phase (2023-2025):
      1. Reporting-only regime with quarterly disclosure of embedded emissions.
      2. No financial liabilities imposed.
    2. Definitive Regime (from 2026):
      1. Mandatory purchase and surrender of CBAM certificates.
      2. Threshold-based authorisation requirement for EU importers (above 50 tonnes).

    Which Sectors and Products are Covered?

    1. Iron and Steel: Includes selected downstream products such as nuts and bolts.
    2. Cement: High process emissions sector.
    3. Aluminium: Energy-intensive production profile.
    4. Fertilisers: Emissions from chemical processing.
    5. Electricity: Cross-border power imports.
    6. Hydrogen: Emerging but carbon-sensitive input.

    Together, these sectors account for over 50% of emissions in EU ETS-covered industries when fully phased in.

    Why Did the EU Introduce CBAM?

    1. Carbon Leakage Risk: Prevents displacement of emissions rather than their reduction.
    2. ETS Integrity: Supports tightening of the EU ETS by phasing out free allowances.
    3. Climate Ambition: Reinforces the EU’s 55% emissions reduction target by 2030.
    4. Trade Neutrality: Aligns treatment of domestic and imported goods.

    What are the Global and Economic Implications?

    • Emission Outcomes: OECD simulations indicate global emissions fall by 0.54% with CBAM, compared to 0.39% without it.
    • Trade Reorientation: EU importers shift sourcing towards cleaner producers.
    • Sectoral Spillovers:
      1. Covered EU industries regain domestic competitiveness but face export disadvantages.
      2. Downstream sectors face higher input costs without border protection.
    1. Country-Level Effects:
      1. Cleaner exporters (Chile, Mexico, Türkiye) gain marginally.
      2. Carbon-intensive exporters (India, South Africa) face modest export contraction (~0.2%).

    Why Does CBAM Matter for India?

    1. Export Exposure: India is a major exporter of iron, steel, aluminium, and fertilisers to the EU.
    2. Carbon Intensity Gap: Higher emissions intensity increases CBAM liability.
    3. Policy Equity Concerns: Raises questions of common but differentiated responsibilities.
    4. Administrative Burden: Requires robust emissions accounting and verification infrastructure.
    5. Diplomatic Engagement: EU’s acknowledgment of India’s concerns reflects negotiation space.

    Are there any regulatory concessions given to India on the CBAM regime after the India-EU FTA?  

    1. India secured a “forward-Most Favoured Nation (forward-MFN) clause on CBAM”, i.e., any future CBAM relaxations, flexibilities or concessions that the EU grants to other partners will automatically apply to India.
    2. Technical dialogue & cooperation: A structured technical dialogue to ease market access under CBAM and help exporters comply.
    3. Financial support pledge: The EU committed financing assistance (reported figure: ~€500 million over two years) to support India’s emissions reduction efforts.
    4. Rapid-response / rebalancing mechanism: Treaty language to rebalance rights if EU regulatory measures impair FTA benefits to Indian firms (safeguard-like clause).
    5. CBAM was not removed: The FTA does not repeal or exempt India from CBAM. The EU confirmed CBAM remains in place; the deal only ensures parity if the EU later gives concessions to others. CBAM remains operational.
    6. Plain effect of the forward-MFN clause: India will get the same future relaxations the EU grants other partners but CBAM still applies until and unless the EU changes its rules for everyone.

    Likely sectoral impact on India (concise, with editorial/analysis references)

    1. Steel (highest exposure): Continued cost pressure for flat-rolled and high-carbon products; EU remains a major buyer (e.g., ~44% of India’s steel exports to EU in some analyses), so impact on volumes and margins persists unless India decarbonises faster. .
    2. Aluminium: Risk of lower exports for high-emission aluminium; parity helps if EU later gives credits or recognition to cleaner producers, but immediate certificate costs remain.
    3. Cement & fertilisers: High process emissions mean persistent CBAM liability; cost pass-through to EU buyers limited, exporters will bear squeeze. 
    4. Downstream industries (autos, machinery): Indirect effect via higher input costs if upstream suppliers face CBAM costs; competitiveness may be affected for export-oriented value chains. 
    5. MSMEs: Disproportionate burden from verification and reporting costs, parity clause doesn’t reduce compliance complexity. Editorials warn of non-tariff barrier effects. .

    Conclusion

    The Carbon Border Adjustment Mechanism marks a structural shift in global trade, where climate regulation increasingly conditions market access. For India, CBAM poses real competitiveness and compliance challenges for carbon-intensive sectors, even as it aligns with the EU’s climate ambitions. The conclusion of the India–EU Free Trade Agreement provides limited but meaningful relief by securing a forward-Most Favoured Nation–type non-discrimination clause on CBAM, ensuring parity with any future concessions extended to other partners. However, the agreement does not dilute or suspend CBAM obligations, and carbon costs will continue to apply from 2026. Ultimately, the FTA mitigates relative disadvantage but does not eliminate structural pressures. India’s long-term response must therefore combine trade diplomacy with accelerated domestic decarbonisation, robust emissions accounting, and targeted support for vulnerable sectors to remain competitive in an increasingly climate-regulated global economy.

    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: CBAM connects climate mitigation with trade by pricing carbon in imports, making environmental regulation a market-access condition. It fits GS-III Environment as an example of climate policy shaping global trade and industry.

  • New Plant Species Discovered in Nagaland: Hoya nagaensis

    Why in the News?

    Researchers from Nagaland University have discovered a new plant species, Hoya nagaensis, in the high-altitude forests of Nagaland, highlighting the biodiversity richness of Northeast India and the conservation value of community-managed forests.

    About Hoya nagaensis

    • Newly identified plant species belonging to the Hoya genus
    • Genus Hoya is known for ornamental plants with distinctive flowers
    • Characterised by
      • Unique leaf shapes
      • Distinct floral features, clearly differentiating it from known species

    Location of Discovery

    • Found in Kavünhou Community Reserved Forest
    • District: Phek, Nagaland
    • Habitat: High-altitude temperate forests of the Eastern Himalaya
    • Recorded so far from only one location

    Conservation Status

    • Provisionally classified as Critically Endangered
    • Reasons
      • Extremely limited geographical range
      • Threats from shifting cultivation
      • Forest disturbance
    [2023] Consider the following statements: Once the Central Government notifies an area as a ‘Community Reserve’ 

    1. The Chief Wildlife Warden of the State becomes the governing authority of such forest

    2. Hunting is not allowed in such area

    3. People of such area are allowed to collect non-timber forest produce

    4. People of such area are allowed traditional agricultural practices

    How many of the above statements are correct? 

    (a) Only one (b) Only two (c) Only three (d) All four

    Hoya nagaensis was specifically discovered in the Kavünhou Community Reserved Forest. This PYQ tests the administrative and legal rules governing such protected areas, which are vital for the conservation of rare species in the Northeast.

  • Pygmy Hog

    Why in the News?

    India’s Pygmy hog is rapidly declining due to loss and degradation of tall grassland habitats, even though it plays a critical role in maintaining grassland ecosystem health.

    About Pygmy Hog

    • Smallest and rarest wild pig species in the world
    • One of the few mammals that builds its own nest with a roof
    • Functions as an indicator species, reflecting grassland health

    Habitat

    • Prefers undisturbed tall grasslands with early succession riverine vegetation
    • Habitat includes dense tall grasses mixed with herbs, shrubs and young trees
    • Present distribution restricted to
      • Manas National Park
      • Orang National Park

    Ecological Role

    • Forages by digging soil using its snout
    • Feeds on roots, tubers, fruits, termites, earthworms and eggs
    • Improves soil aeration and fertility
    • Aids seed dispersal, supporting grassland regeneration

    Conservation Status

    • IUCN Red List: Critically Endangered
    • Listed under Schedule I of the Wildlife Protection Act, 1972
    • Estimated wild population is very small, confined to Assam
    [2013] Consider the following: 

    1. Star tortoise 

    2. Monitor lizard 

    3. Pygmy hog 

    4. Spider monkey 

    Which of the above are naturally found in India? 

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

  • Water Bankruptcy and Global Agriculture

    Why in the News?

    A recent UN report titled Global Water Bankruptcy: Living Beyond Our Hydrological Means in the Post Crisis Era, released by United Nations University Institute for Water, Environment and Health on 20 January 2026, warns that the world has entered a phase of global water bankruptcy, severely impacting agriculture and food security.

    What is Water Bankruptcy?

    • A condition where long term water use exceeds renewable inflows and safe depletion limits
    • Agriculture is no longer facing a temporary water crisis but operating beyond hydrological sustainability
    • Rivers, lakes, aquifers, wetlands, soils and glaciers damaged beyond realistic recovery

    Key Findings of the Report

    • Agriculture and Water Use: ~70 percent of global freshwater withdrawals used for agriculture.Expansion of agricultural land is no longer viable
    • Scale of Exposure:~3 billion people live in areas with declining or unstable water storage. More than half of global food production located in water stressed regions. 170 million hectares of irrigated cropland under high or very high water stress.
    • Land and Soil Degradation: Over 50 percent of global agricultural land moderately or severely degraded. Global salinisation has degraded. 82 million hectares of rainfed cropland. 24 million hectares of irrigated cropland. Accelerates desertification and reduces soil moisture retention.
    [2021] Among the following, which one is the least water efficient crop? 

    (a) Sugarcane 

    (b) Sunflower 

    (c) Pearl millet 

    (d) Red gram

  • [23rd January 2026] The Hindu OpED: A dangerous march towards a Himalayan ecocide

    PYQ Relevance

    [UPSC 2019] Vulnerability is an essential element for defining disaster impact and its threat to people. How and why can vulnerability to disasters be characterized? Discuss different type of vulnerability with reference to disasters.

    Linkage: This PYQ tests conceptual clarity on disaster vulnerability under GS-III (Disaster Management), especially the classification of physical, environmental, social, and institutional vulnerabilities. The article demonstrates how institutional and environmental vulnerabilities amplify natural hazards into recurring disasters.

    Mentor’s Comment

    This article analyses the growing ecological and governance crisis in the Indian Himalayas, reflected in frequent disasters and infrastructure decisions that ignore scientific and policy safeguards. Using the Char Dham road-widening project as an example, it shows how unsafe land use, poor engineering choices, and weak policy coordination are increasing disaster risks in a highly fragile mountain region.

    Why in the news?

    The Himalayas experienced nearly 331 days of climate impacts in 2025, resulting in over 4,000 deaths, with Himachal Pradesh and Uttarakhand bearing the heaviest toll. Despite repeated disasters from cloudbursts, landslides, avalanches, and flash floods, the government has approved large-scale infrastructure expansion in disaster-prone zones. This includes the felling of nearly 7,000 Deodar trees for the Char Dham road-widening project.

    Why is the Himalayan disaster risk escalating?

    1. Climate intensification: High-altitude regions have warmed 50% faster than the global average since 1950, increasing extreme rainfall, glacial melt, and flash floods.
    2. Near-continuous exposure: 2025 recorded 331 days of climate impacts, indicating a permanent hazard regime rather than seasonal extremes.
    3. Hazard convergence: Cloudbursts, landslides, avalanches, and land subsidence increasingly interact to produce compound disasters.

    Why is infrastructure expansion central to the crisis?

    1. Unsafe land use: Cutting unstable slopes for wide highways, drilling tunnels without adequate geological surveys, and large hydropower construction directly destabilise fragile terrain.
    2. Slope destabilisation: Excessively steep hill-cutting violates the natural angle of repose of Himalayan geology, creating permanent instability.
    3. Muck dumping: Indiscriminate disposal of excavated debris into rivers and slopes accelerates erosion and flood risk.

    What makes the Char Dham road-widening project problematic?

    1. Incorrect road standard: Adoption of the DL-PS (12-metre paved surface) standard in a disaster-prone region contradicts ecological and geological constraints.
    2. Project fragmentation: Bypassing a comprehensive Environmental Impact Assessment through artificial project segmentation.
    3. Scale of impact: Nearly 700 km of widened roads have generated over 800 active landslide zones, frequently closing strategic border routes.
    4. Delayed remedies: Retrofitting slopes with fibreglass bolts and wire mesh comes eight years after large-scale destabilisation, limiting effectiveness.

    Why are Deodar forests ecologically irreplaceable?

    1. Slope stabilisation: Extensive root systems bind fragile soils, reducing landslides and debris flows.
    2. Avalanche buffering: Forest cover acts as a natural barrier against glacial debris and snow avalanches.
    3. River health: Deodar forests regulate water temperature, sustain dissolved oxygen, and maintain water quality in snowmelt-fed streams.
    4. Microbial regulation: Antimicrobial compounds from leaf litter suppress harmful bacteria while promoting beneficial microbial communities.
    5. Legal recognition: Located within the Bhagirathi Eco-Sensitive Zone (≈4,000 sq km), established in 2012 to protect the Ganga’s last pristine stretch.

    Why is ‘tree translocation’ scientifically flawed?

    1. Ecological specificity: Centuries-old Deodars perform site-specific functions that cannot be replicated elsewhere.
    2. Functional loss: Uprooting effectively nullifies root-based slope stabilisation and microbial regulation.
    3. Absence of alternatives: No suitable terrain exists to recreate identical ecological conditions.

    How does governance failure amplify disaster risk?

    1. Policy contradiction: Current development initiatives violate the National Mission for Sustaining the Himalayan Ecosystem (NMSHE).
    2. Mandate dilution: NMSHE prioritises glacier monitoring, biodiversity protection, hazard mitigation, and sustainable livelihoods, but lacks implementation authority.
    3. Short-termism: Persistent prioritisation of immediate economic gains over long-term disaster resilience.
    4. Regulatory erosion: Repeated warnings by the National Green Tribunal remain weakly enforced.

    Why is climate change a ‘risk multiplier’ in the Himalayas?

    1. Erratic rainfall: Intensifies cloudbursts and flash floods.
    2. Glacial melt acceleration: Creates a dangerous ‘water-peak phase’ of high runoff and catastrophic floods.
    3. Future scarcity: Post-glacier retreat phase leads to prolonged water scarcity and drought.

    What human behaviours worsen ecological stress?

    1. Unregulated tourism: Exceeds carrying capacity in fragile zones.
    2. Vehicular pressure: Heavy traffic on unstable mountain roads increases slope stress.
    3. Waste mismanagement: Absence of functional solid-waste systems contaminates water sources.

    Conclusion

    Disaster resilience in the Himalayas is no longer optional but foundational to national security, ecological stability, and economic sustainability. Infrastructure decisions that ignore geological reality and ecological limits convert development into systemic risk. Scientific planning, policy coherence, and accountability must precede expansion in one of India’s most climate-sensitive landscapes.

  • Mysterious “Boiling” Seawater off Gujarat Coast

    Why in the News?

    Authorities and fishing communities have reported unusual churning and bubbling of seawater off the Gujarat coast in the Arabian Sea, prompting disaster management agencies to issue alerts and advise vessels to exercise extreme caution.

    What is Being Observed?

    • Large patches of seawater showing continuous bubbling and turbulence, resembling surface boiling
    • Phenomenon captured in videos by fishermen
    • Observed close to fishing grounds and sea transport routes

    Possible Causes  

    Natural causes

    • Methane or natural gas seepage from seabed
    • Underwater tectonic activity
    • Activity along nearby submarine ridges like the Murray Ridge or Carlsberg Ridge
    • Hydrothermal or volcanic processes

    Anthropogenic causes

    • Leakage from undersea gas or oil pipelines
    • Industrial accidents linked to offshore installations
    • Disturbances caused by heavy maritime traffic

    Prelims Pointers

    • Bubbling seas can indicate methane hydrate release
    • Arabian Sea hosts active submarine ridges, unlike the Bay of Bengal
    • Such phenomena do not automatically imply tsunamis, but signal seabed processes
    [2019] Which of the following statements are correct about the deposits of ‘methane hydrate’? 

    1. Global warming might trigger the release of methane gas from these deposits

    2. Large deposits of ‘methane hydrate’ are found in Arctic Tundra and under the seafloor

    3. Methane in atmosphere oxidizes to carbon dioxide after a decade or two

    Select the correct answer using the code given below: 

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