Every news story that matters for the Environment & Ecology part of UPSC Civil Services GS3 (Economy · S&T · Environment · Security), written for the exam: why in news, background, prelims facts, a practice MCQ and a mains question. 503 notes so far, updated daily.
Why in news: The Tamil Nadu Forest Department reported 685 human deaths due to wild animal interactions between 2015 and 2025, highlighting the severity of human-animal conflict.
Out of 685 fatalities in Tamil Nadu between 2015 and 2025, 522 were caused by elephant attacks. The year 2019 recorded the highest number of deaths with 62 reported cases.
Prelims pointers (4)
FactTotal human deaths from wild animal interactions in Tamil Nadu (2015-2025): 685
FactNumber of fatalities specifically caused by elephant attacks: 522
FactPeak year for wild animal fatalities in Tamil Nadu: 2019 (62 deaths)
PlaceAnamalai Tiger Reserve: Location of the Field Director mentioned in the report
Mains angle
Q. Discuss the socio-ecological drivers of increasing human-wildlife conflict in India and suggest measures to mitigate fatalities while ensuring wildlife conservation.
Habitat loss: Encroachment and degradation of natural corridors forcing wildlife into human-dominated landscapes
Agricultural shifts: Changes in crop patterns increasing the frequency of animal-human interactions
Policy shift: Transitioning from punitive measures against wildlife to human-centric mitigation strategies
Why in news: The Forest Department is conducting a two-day bird census at Kolleru Lake to assess the health of the wetland ecosystem and document migratory bird populations.
Kolleru Lake is one of Asia's largest freshwater lakes. The census involves documenting bird species, population strength, nesting behavior, and habitat conditions.
Prelims pointers (2)
PlaceKolleru Lake: One of Asia's largest freshwater lakes
EnvironmentKolleru Lake serves as a habitat for thriving migratory bird populations
Mains angle
Q. Discuss the significance of wetland conservation in maintaining biodiversity and the role of periodic biological censuses in ecological monitoring.
Ecological monitoring: Data-driven assessment of nesting behavior and habitat health
Biodiversity conservation: Protecting migratory corridors and freshwater wetland integrity
Why in news: The Cuddalore Collector distributed 185 Turtle Excluder Devices (TEDs) to fishermen to prevent sea turtles from being trapped in trawl nets during the nesting season.
The Cuddalore Collector distributed 185 TEDs worth ₹43.45 lakh to local fishermen. The devices were designed by the Central Institute of Fisheries Technology (CIFT), Kochi, and are fitted to trawl nets.
Prelims pointers (3)
S&TTurtle Excluder Devices (TEDs): Devices fitted to trawl nets to allow sea turtles to escape while retaining fish.
Fact185 TEDs were distributed in Cuddalore district with a total value of ₹43.45 lakh.
PlaceCuddalore: District in Tamil Nadu where the distribution took place.
Mains angle
Q. Discuss the importance of balancing marine biodiversity conservation with the livelihoods of coastal fishing communities in India.
Conservation-Livelihood Trade-off: Balancing sea turtle protection with the economic viability of small-scale artisanal fishing.
Institutional Oversight: Role of Task Forces in enforcing seasonal fishing restrictions and monitoring nesting habitats.
Technological Intervention: Effectiveness of TEDs in reducing bycatch compared to total fishing bans.
Why in news: Project Tiger Field Director B. Vijay Kumar clarified that tranquilizing tigers should not be decided by public pressure but only when there is a proven threat to human life or property.
Wildlife experts warned that tranquilizing tigers carries a 50/50 chance of recovery and can lead to aggression, depression, or death in captivity. Forest officials suggested using burning chillies and husk as a non-lethal deterrent to keep tigers away from villages.
Prelims pointers (3)
EnvironmentTranquilizing tigers carries a 50/50 recovery rate and risks of aggression or depression.
FactProject Tiger Field Director B. Vijay Kumar recommended burning chillies and husk as a deterrent.
PostB. Vijay Kumar serves as the Field Director of Project Tiger.
Mains angle
Q. Discuss the challenges in balancing human-wildlife conflict management with the conservation of apex predators in India's protected areas.
Ecological risk: Potential for tiger mortality and behavioral changes due to chemical tranquilization.
Conflict management: Balancing immediate village safety with the legal mandate to preserve natural habitats.
Policy trade-off: Non-lethal deterrents versus the logistical challenges of human-wildlife coexistence.
Why in news: Over 150 dead olive ridley sea turtles were found washed ashore in Srikakulam district, highlighting the impact of fishing nets and plastic pollution on marine biodiversity.
More than 150 olive ridley sea turtles were found dead on the beaches of Dokulapadu in Srikakulam district. Local residents and organizations attribute the mortality to squid nets and plastic pollution during the nesting season.
Prelims pointers (2)
PlaceDokulapadu is a coastal area in the Srikakulam district of India.
FactOver 150 turtles were reported dead in the recent incident.
Mains angle
Q. Discuss the impact of anthropogenic activities like plastic pollution and industrial fishing on marine biodiversity and suggest measures to mitigate these threats.
Habitat degradation: Entanglement in squid nets and plastic debris causing high mortality during nesting
Regulatory gap: Need for stricter enforcement of coastal zone regulations and fishing net specifications
Why in news: Environment Minister Eshwar Khandre directed Forest and Wildlife Department officials to intensify surveillance and precautionary measures to prevent forest fires and ensure wildlife welfare.
The Environment Minister instructed the use of drone cameras and increased patrols in sensitive areas. The directive also included ensuring wildlife access to food and water during summer and providing safety for devotees at the Male Mahadeshwara Hills temple.
Prelims pointers (3)
PostEshwar Khandre: Union Minister of Environment, Forest and Climate Change
PlaceMale Mahadeshwara Hills: Location of a temple where safety precautions for devotees were mandated
FactDrone cameras and patrols: Specific measures mandated for forest fire surveillance
Mains angle
Q. Discuss the ecological and administrative challenges in managing forest fires in India and suggest measures to balance biodiversity conservation with religious tourism.
Ecological impact: Habitat degradation and loss of biodiversity due to recurring summer forest fires
Technological integration: Limitations of drone surveillance in dense forest canopies and remote terrains
Human-Wildlife conflict: Balancing religious pilgrimage safety with the preservation of wildlife corridors
Why in news: A whale shark was sighted off the Chinna Rushikonda coast in Andhra Pradesh, highlighting the importance of seasonal oceanographic patterns and marine diversity in the region.
The whale shark is the world's largest fish species. The sighting occurred off the Chinna Rushikonda coast in Andhra Pradesh, where colder winter currents bring plankton blooms that attract these sharks for feeding.
Prelims pointers (3)
EnvironmentWhale shark: Identified as the world's largest fish species.
FactWhale sharks are attracted to the region during winter due to colder currents and plankton blooms.
FactEast Coast Conservation Team (ECCT): Organization working with fishing communities on whale shark strandings.
Mains angle
Q. Discuss the ecological significance of marine megafauna and the challenges in mitigating accidental by-catch in coastal fishing zones.
Ecological indicator: Whale shark presence reflects health of plankton-rich marine ecosystems
By-catch mitigation: Conflict between artisanal fishing livelihoods and marine biodiversity conservation
Spatial management: Need for designated marine protected areas to reduce accidental capture
Why in news: The Karnataka government officially declared the Hesaraghatta Grasslands as a conservation reserve to protect its biodiversity and carbon sink potential.
The Hesaraghatta Grasslands in Karnataka are designated as a conservation reserve to protect endangered wildlife and migratory birds. The area serves as a significant carbon sink and biodiversity hotspot, previously facing threats from proposed film city developments.
Prelims pointers (2)
FactHesaraghatta Grasslands: Function as carbon sinks and biodiversity hotspots.
EnvironmentHesaraghatta Grasslands: Habitat for endangered wildlife species and migratory birds.
Mains angle
Q. Discuss the challenges in balancing urban development with the preservation of grassland ecosystems in India's biodiversity hotspots.
Enforcement gap: Lack of oversight leading to illegal garbage dumping and unregulated grazing in protected zones
Ecological trade-off: Conflict between industrial/recreational land use (film cities) and carbon sink preservation
Stakeholder friction: Need for community-led conservation models to mitigate local environmental degradation
Why in news: The Commission for Air Quality Management (CAQM) released a report identifying secondary particulate matter as the primary driver of Delhi's winter pollution to inform the Air Quality Early Warning System.
The CAQM report released on January 21, 2026, identifies secondary particulate matter as the largest contributor to winter pollution at 27%. Other major contributors include transport (23%) and biomass burning (20%).
Prelims pointers (4)
BodyCAQM: Commission for Air Quality Management, established to oversee air quality in the NCR.
FactSecondary particulate matter contributes 27% to Delhi's winter pollution.
FactTransport and biomass burning contribute 23% and 20% respectively to winter pollution.
BodyIITM Pune: Developed the Air Quality Early Warning System and Decision Support System.
Mains angle
Q. Analyze the role of source apportionment studies and real-time monitoring systems in mitigating urban air pollution in the National Capital Region.
Data integration: Need for standardized analysis methodologies across diverse regional studies
Technological intervention: Leveraging IITM Pune's Decision Support System for proactive policy response
Source-specific mitigation: Addressing secondary particulate formation vs primary biomass burning
Keywords: Source Apportionment · Secondary Particulate Matter · Air Quality Management · Decision Support System · Emissions Inventory
Why in news: The Tamil Nadu Raptor Research Foundation and AIWC are conducting the first state-wide raptor assessment in Tamil Nadu to identify threats and distribution patterns for over 65 species.
The assessment is scheduled from January 31 to February 1, 2026, covering over 50 forest divisions. It targets both diurnal and nocturnal raptors across ecosystems like forests, hillocks, wetlands, and dump yards.
Prelims pointers (3)
EnvironmentThe assessment covers over 65 raptor species in Tamil Nadu.
FactThe survey covers over 50 forest divisions across diverse ecosystems.
BodyThe Tamil Nadu Forest Department is collaborating with the Advanced Institute for Wildlife Conservation (AIWC).
Mains angle
Q. Discuss the importance of species-specific biodiversity assessments in formulating effective conservation strategies for raptors in fragmented landscapes.
Data-driven conservation: Identifying specific threats like habitat loss and human-wildlife conflict in dump yards
Ecosystem connectivity: Assessing raptor distribution across diverse habitats from hillocks to coastal areas
Keywords: Biodiversity conservation · Raptor assessment · Habitat fragmentation · Species distribution · Wildlife management
Why in news: The Centre for Wildlife Rehabilitation and Conservation (CWRC) released two male rhinos, Chandra and Kamal, back into Kaziranga National Park after they were rescued from floods in 2020 and 2021.
Two male rhinos, Chandra and Kamal, were returned to Kaziranga National Park after being hand-raised by the CWRC. The CWRC has successfully released a total of 23 rhinos rescued from flooding to date.
Prelims pointers (3)
EnvironmentKaziranga National Park is a known habitat for rhinoceroses.
BodyCentre for Wildlife Rehabilitation and Conservation (CWRC) provides emergency care and hand-rears rescued wildlife.
FactCWRC has successfully released 23 rhinos rescued from flooding.
Mains angle
Q. Discuss the challenges in wildlife rehabilitation and the importance of community-led conservation in protecting endangered species from climate-induced disasters.
Habitat loss: Impact of recurring floods on rhino population stability
Logistical bottleneck: High costs and technical expertise required for hand-rearing and site-specific release
Ecological monitoring: Need for long-term tracking post-release to ensure survival in wild habitats
Why in news: The Kerala State Pollution Control Board reported that coliform levels in the Periyar and Kadambrayar rivers near Brahmapuram exceeded CPCB limits due to domestic effluents and leachate from the Brahmapuram plant.
Water samples from the Kalamassery stretch of Periyar and Kadambrayar recorded high faecal contamination between January and November 2025. Levels reached up to 7,000 MPN/100 ml, significantly exceeding the CPCB limit of 2,500 MPN/100 ml.
Prelims pointers (4)
FactCPCB maximum permissible limit for total coliform in bathing water: less than 2,500 MPN per 100 ml
FactRecorded coliform levels in Periyar and Kadambrayar: up to 7,000 MPN/100 ml
PlaceBrahmapuram plant and Kalamassery stretch are located in Kerala
BodyKerala State Pollution Control Board monitors water quality under the National Water Quality Monitoring Programme
Mains angle
Q. Discuss the challenges in managing industrial leachate and domestic effluents in ecologically sensitive zones and suggest measures to mitigate water pollution.
Regulatory oversight: Inadequate monitoring of leachate discharge from waste processing plants
Infrastructure gap: Insufficient sewage treatment capacity for domestic effluents in urban-peri-urban stretches
Public health risk: High faecal contamination levels posing risks to riparian communities and groundwater
Why in news: Odisha’s State Forest and Environment Department reported a rise in the saltwater crocodile population to 1,858 following a pilot drone-based survey.
The survey was conducted from January 8 to 10, 2026, across river systems including Bhitarkanika National Park, Gahirmatha Wildlife Sanctuary, and the Mahanadi deltaic area. The population increased by 32 from the previous year, with the highest concentration (76.64%) found in the Kanika Wildlife Range.
Prelims pointers (4)
EnvironmentSaltwater crocodiles were surveyed in Odisha's Bhitarkanika National Park and Gahirmatha Wildlife Sanctuary.
FactThe 2026 survey recorded a total of 1,858 crocodiles in the monitored river systems.
FactThe Kanika Wildlife Range accounted for 76.64% of the total crocodile population identified in the survey.
S&TDrone-based surveys were utilized by the State Forest and Environment Department for population estimation.
Mains angle
Q. Discuss how the integration of drone technology and remote sensing can enhance biodiversity monitoring and conservation efforts in India's estuarine ecosystems.
Technological leap: Drone-based monitoring reduces human-wildlife conflict risks and improves data accuracy in inaccessible riverine habitats
Habitat management: Balancing deltaic agricultural activities with the conservation of critical estuarine crocodile breeding grounds
Why in news: Researchers at the University of California, San Diego discovered a soft sediment layer beneath Greenland's ice sheet that may accelerate glacier flow and sea-level rise.
The study utilized seismic waves from earthquakes to identify soft basal sediments under the Greenland ice sheet. These sediments reduce friction, potentially increasing the velocity of glaciers moving toward the coast.
Prelims pointers (3)
S&TSeismic waves from earthquakes were used to map the sub-glacial layers of Greenland.
PlaceGreenland's ice sheet is the primary focus of the study regarding accelerated ice flow.
FactSoft basal sediments are identified as the primary factor reducing friction for glacier movement.
Mains angle
Q. How do sub-glacial geological features influence global sea-level rise projections, and what are the implications for coastal infrastructure planning?
Data gap: Current climate models may underrepresent the role of basal sediment friction in ice-sheet dynamics
Infrastructure risk: Accelerated sea-level rise necessitates rapid adaptation of coastal engineering and urban planning
Why in news: The Calcutta High Court took suo motu cognisance of worsening air quality in Kolkata and issued a notice to the State Government to respond by February 28th.
The court is hearing a PIL filed by advocate Akash Sharma alleging that hazardous air quality violates the right to life and health. Professor Abhijit Chatterjee of the Bose Institute attributed the pollution to increased pollutant accumulation, cold weather, and waste burning.
Prelims pointers (3)
PlaceKolkata: City facing worsening Air Quality Index (AQI) and hazardous air quality levels.
S&TNitrogen dioxide and ground-level ozone: Identified as toxic gaseous pollutants requiring expert attention.
FactFebruary 28th: Deadline set by Calcutta High Court for the state government's response.
Mains angle
Q. Discuss the constitutional implications of deteriorating air quality on the Right to Life and the role of the judiciary in enforcing environmental standards.
Judicial activism: Balancing court-mandated deadlines with the state's administrative capacity to implement pollution controls
Public health crisis: Correlation between waste burning practices and hazardous nitrogen dioxide levels in urban corridors
Keywords: Suo motu cognisance · Right to Life · Public Interest Litigation · Pollutant accumulation · Judicial oversight
Why in news: The Tamil Nadu Department of Environment, Climate Change and Forests invited bids for the construction of an International Bird Centre (IBC) to promote bird conservation awareness.
The project is estimated to cost ₹46.94 crore and will be developed over two sites: Agaram Reserved Forest (along the East Coast Road) and Kazhuveli Lake in Villupuram. The center will include a Conservation Centre, wetland mimic area, research and training facilities, and a bird-watching tower.
Prelims pointers (3)
PlaceKazhuveli Lake and Agaram Reserved Forest are located in Villupuram, Tamil Nadu.
FactThe estimated cost for the International Bird Centre construction is ₹46.94 crore.
S&TThe IBC will feature a wetland mimic area and a bird-watching tower for conservation awareness.
Mains angle
Q. Discuss the importance of establishing specialized conservation centers in wetland ecosystems for biodiversity preservation and ecological education in India.
Ecological education: Bridging the gap between scientific research and public awareness through interpretive centers
Habitat preservation: Balancing infrastructure development with the integrity of wetland mimic areas and migratory bird corridors
Why in news: The Central Pollution Control Board (CPCB) reported a 'severe' AQI of 439 in Delhi, leading the Commission for Air Quality Management (CAQM) to reinstate Stage-IV GRAP measures.
The India Meteorological Department (IMD) reported dense fog and cold wave conditions, significantly reducing visibility.
Prelims pointers (4)
BodyCPCB: Central Pollution Control Board monitors air quality
BodyCAQM: Commission for Air Quality Management oversees NCR air quality
SchemeGRAP: Graded Response Action Plan includes Stage-IV measures for severe pollution
BodyIMD: India Meteorological Department reports fog and cold wave conditions
Mains angle
Q. Critically analyze the effectiveness of the Graded Response Action Plan (GRAP) in mitigating severe air pollution in the National Capital Region.
Institutional bottleneck: Coordination gaps between state and central agencies in enforcing Stage-IV restrictions
Meteorological interplay: Synergy between stagnant atmospheric conditions (cold waves/fog) and industrial/vehicular emissions
Policy trade-off: Balancing immediate economic activity restrictions against long-term public health imperatives
Keywords: Air Quality Index · Graded Response Action Plan · Atmospheric conditions · Public health · NCR pollution
Why in news: The Sub-Committee on the Graded Response Action Plan (GRAP) convened a meeting to address Delhi's 'very poor' AQI and dense fog causing flight delays.
On January 17, 2026, dense fog at Indira Gandhi International Airport caused flight delays and low visibility for road and rail traffic. The CPCB reported 'very poor' AQI levels, with expectations of a shift to the 'severe' category.
Prelims pointers (4)
BodyIMD: India Meteorological Department reported the temperature and visibility data.
BodyCPCB: Central Pollution Control Board indicated the 'very poor' AQI levels.
SchemeGRAP: Graded Response Action Plan is the mechanism used to manage air quality in Delhi-NCR.
FactAQI status: Reported as 'very poor' on January 17, 2026.
Mains angle
Q. Discuss the institutional and logistical challenges in implementing the Graded Response Action Plan (GRAP) to mitigate seasonal air pollution in the National Capital Region.
Inter-agency coordination: Delays in synchronized enforcement between CPCB, IMD, and local municipal bodies.
Logistical bottlenecks: Impact of low visibility on aviation safety and regional transport infrastructure.
Policy trade-offs: Balancing industrial/construction activity with emergency air quality mandates under GRAP.
Keywords: Air Quality Index · Graded Response Action Plan · Atmospheric Visibility · Inter-agency Coordination · Pollution Mitigation
Why in news: The Karnataka High Court issued an interim order halting ground-level development of the Roerich and Devika Rani Roerich Estate in Bengaluru due to its status as a 'deemed forest' and its role in an elephant corridor.
The Roerich and Devika Rani Roerich Estate in Bengaluru is being proposed as an eco-tourism hub. The High Court noted the site's significance as a biodiversity site and part of an elephant corridor, while the Central government has not yet received a formal proposal for the project.
Prelims pointers (4)
PlaceRoerich and Devika Rani Roerich Estate is located in Bengaluru, Karnataka
FactThe estate is identified as a 'deemed forest' and part of an elephant corridor
BodyThe project was intended to be implemented under a Central government special assistance scheme for iconic tourist centers
Act / BillThe project was alleged to violate the 1996 Act governing the estate's acquisition and transfer
Mains angle
Q. Discuss the conflict between infrastructure development for tourism and the preservation of biodiversity corridors in ecologically sensitive zones.
Ecological integrity: Risk of habitat fragmentation and loss of biodiversity in 'deemed forest' zones
Regulatory oversight: Lack of formal proposal submission to Central government for iconic tourist center schemes
Why in news: The Expert Appraisal Committee (EAC) directed the Tamil Nadu government to redesign the International Dugong Conservation Centre at Manora to minimize ecological impact in a CRZ-III No Development Zone.
The EAC of the Union Ministry of Environment, Forest and Climate Change flagged the use of conventional cement and concrete for a project covering 22,000 square metres. The committee recommended timber-based, prefabricated, or composite materials to protect the coastal ecosystem.
Prelims pointers (5)
PlaceManora is located in the Thanjavur district of Tamil Nadu.
FactThe proposed project covers approximately 22,000 square metres.
EnvironmentDugong is the target species for the proposed International Dugong Conservation Centre.
BodyThe Expert Appraisal Committee (EAC) operates under the Union Ministry of Environment, Forest and Climate Change.
FactThe project site falls within the CRZ-III No Development Zone.
Mains angle
Q. Discuss the conflict between infrastructure development and coastal conservation in India. How can nature-sensitive design mitigate the ecological impact of conservation projects?
Regulatory friction: Balancing infrastructure requirements with strict CRZ-III No Development Zone restrictions
Material transition: Shifting from carbon-intensive concrete to timber-based or prefabricated sustainable construction
Ecological integrity: Mitigating habitat fragmentation in coastal zones for marine mammal conservation
Keywords: CRZ-III · Ecological Sensitivity · Sustainable Construction · Coastal Zone Management · Biodiversity Conservation