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. 481 notes so far, updated daily.
Why in news: IITM Pune study revealed that 25% of rainfall over the North Western Ghats evaporates mid-air during the Southwest monsoon, providing critical data for refining weather models.
The study, published in Atmospheric Chemistry and Physics, used isotopic analysis to measure raindrop evaporation. It found that while the average evaporation is 25%, the daily variance ranges from 4% to 61% during the June-September monsoon period.
Prelims pointers (4)
BodyIITM (Indian Institute of Tropical Meteorology) is headquartered in Pune.
FactAverage mid-air rain evaporation in North Western Ghats is 25% during the Southwest monsoon.
FactRaindrop evaporation rates vary globally, with tropical estimates near 20% and Barbados near 60%.
S&TIsotopic analysis is used to measure the evaporation of rain mass.
Mains angle
Q. Discuss how understanding micro-scale atmospheric processes like raindrop evaporation can enhance the accuracy of monsoon prediction models in India.
Model accuracy: Current climate models struggle to capture sub-cloud layer cooling and downdraft dynamics caused by mid-air evaporation.
Regional variability: Evaporation rates are highly sensitive to local temperature and humidity gradients from arid zones to coastal regions.
Predictive reliability: Inaccurate evaporation data skews rainfall predictions and the assessment of storm-triggering potential.
Why in news: Researchers from India and Sri Lanka discovered three new jumping spider species and rediscovered a fourth in the Western Ghats and Sri Lankan forests.
The study, published in the journal Zootaxa, identified three new species: Onomastus brahmagiri (Brahmagiri Hills), O. silentvalley (Silent Valley National Park), and O. wijesinghei (Sri Lankan mountain forests). It also confirmed the rediscovery of O. patellaris in Tamil Nadu after more than 100 years.
Prelims pointers (5)
EnvironmentOnomastus brahmagiri: New jumping spider species discovered in the Brahmagiri Hills.
EnvironmentOnomastus silentvalley: New jumping spider species discovered in Silent Valley National Park.
EnvironmentOnomastus wijesinghei: New jumping spider species discovered in Sri Lankan mountain forests.
EnvironmentOnomastus patellaris: Rediscovered in Tamil Nadu after over a century.
PlaceSilent Valley National Park: Located in the Western Ghats of Kerala, India.
Mains angle
Q. Discuss how the discovery of new species in the Western Ghats highlights the importance of biodiversity conservation amidst escalating climate change threats.
Habitat fragmentation: Encroachment and monoculture plantations reducing niche availability for montane forest fauna
Climate vulnerability: Rising temperatures altering the micro-climates of high-altitude and montane ecosystems
Transboundary conservation: Necessity of collaborative biodiversity monitoring between India and Sri Lanka for shared ecological corridors
Why in news: A conservation initiative in Periyar Tiger Reserve launched a circular economy model to convert invasive African catfish into pet chewers and fish jerky to protect biodiversity and boost local livelihoods.
The project targets the African catfish (Clarias gariepinus), a highly predatory invasive species in the Periyar freshwater ecosystem. The initiative involves converting harvested fish into high-value products like fish jerky and pickles to create a sustainable conservation-livelihood model.
Prelims pointers (3)
EnvironmentAfrican catfish (Clarias gariepinus) is an invasive predatory species in Indian freshwater ecosystems.
PlacePeriyar Tiger Reserve (PTR) is located in the state of Kerala.
FactThe initiative was launched on July 11, 2026, focusing on a circular conservation model.
Mains angle
Q. Discuss how the integration of circular economy principles can effectively manage invasive species while ensuring the socio-economic upliftment of local communities in protected areas.
Ecological threat: Predatory behavior of Clarias gariepinus disrupts native fish populations and aquatic biodiversity.
Livelihood synergy: Converting ecological waste into high-value commercial products creates sustainable income for local stakeholders.
Policy trade-off: Balancing the immediate need for invasive species eradication with the logistical requirements of value-added processing.
Why in news: The BMC reported a total cessation of odour complaints at Mumbai's Kanjurmarg landfill following a Bombay High Court directive to establish a monitoring committee and implement waste management measures.
The Kanjurmarg landfill receives approximately 6,100 metric tonnes of waste daily and has accumulated nearly 189 lakh metric tonnes since 2011. UCLA identified it as one of the world's top 25 methane hotspots.
Prelims pointers (4)
PlaceKanjurmarg landfill: Located in Mumbai, Maharashtra.
FactKanjurmarg landfill: Accumulated nearly 189 lakh metric tonnes of waste since 2011.
S&TMethane: A potent greenhouse gas produced by the anaerobic decomposition of organic waste in landfills.
BodyBMC: Brihanmumbai Municipal Corporation is the local governing body for Mumbai.
Mains angle
Q. Discuss the environmental and public health implications of landfill-based waste management in rapidly urbanizing Indian cities. Suggest sustainable alternatives to mitigate methane emissions.
Public health risk: Chronic respiratory issues and groundwater contamination due to uncontrolled methane and leachate seepage.
Institutional bottleneck: Delayed transition from 'dumping' to 'waste-to-energy' infrastructure despite judicial oversight.
Technical intervention: Limitations of chemical capping and Tarpaumatic covers in addressing long-term subterranean methane hotspots.
Why in news: A 'super' El Niño event is disrupting global fisheries, causing a collapse in Peruvian anchovy yields while increasing tuna catches in California.
El Niño is a Pacific weather pattern occurring every 2-7 years characterized by warmer-than-average sea surface temperatures. It disrupts 'upwelling'—the process where trade winds bring nutrient-dense cold water to the surface—leading to reduced algae growth and migration of fish species.
Prelims pointers (3)
S&TEl Niño: Characterized by the weakening of trade winds and the warming of sea surface temperatures in the tropical Pacific Ocean.
EnvironmentUpwelling: The process of cold, nutrient-dense water rising from the depths to the surface, essential for supporting primary productivity like algae.
FactAnchovies: A primary source of fish oil and animal feed globally, heavily impacted by El Niño-induced migration.
Mains angle
Q. Discuss how climate-induced shifts in marine ecosystems, such as El Niño, pose a threat to global food security and the livelihoods of coastal communities.
Economic instability: Volatility in global seafood prices and export revenues due to species-specific migration patterns.
Ecological vulnerability: Reduced primary productivity from suppressed upwelling affecting marine biodiversity and food chains.
Livelihood displacement: Necessity for fishers to adopt seasonal diversification as traditional fishing grounds become unproductive.
Why in news: The population of the Pygmy Hog, the world's smallest wild pig, has increased to over 500 through captive breeding and recent releases into Manas National Park.
The Pygmy Hog was rediscovered in Assam in the 1970s and was previously thought to be extinct. The Pygmy Hog Conservation Breeding Program, initiated in 1995, successfully increased the population from 6 to over 500 by 2024.
Prelims pointers (4)
EnvironmentPygmy Hog: The world's smallest wild pig species, native to the grasslands of Assam.
PlaceManas National Park: A Tiger Reserve and UNESCO World Heritage site in Assam where Pygmy Hogs are being released.
FactPopulation Growth: The captive breeding program increased the Pygmy Hog population from 6 to over 500 by 2024.
PostGerald Durrell: Conservationist who initiated the initial conservation efforts for the Pygmy Hog.
Mains angle
Q. Discuss the role of ex-situ conservation measures in preventing the extinction of endangered species in India's grassland ecosystems.
Habitat fragmentation: Encroachment and agricultural expansion reducing the available grassland corridors for wild ungulates.
Genetic bottlenecking: Risks of inbreeding in small captive populations requiring rigorous genetic management and monitoring.
Reintroduction hurdles: Challenges in ensuring survival rates of captive-bred animals in wild habitats with high human-wildlife conflict.
Keywords: Ex-situ conservation · Biodiversity loss · Habitat fragmentation · Species rediscovery · Captive breeding
Why in news: The National Green Tribunal (NGT) ordered a mandatory fire safety audit of industrial waste facilities in Tamil Nadu following a major fire at a hazardous waste facility in May 2024.
The NGT Southern Bench directed the Tamil Nadu Pollution Control Board and Fire and Rescue Services Department to audit all industrial waste facilities. The order follows a significant fire incident at a Common Hazardous Waste Facility in Gummidipoondi in May 2024.
Prelims pointers (3)
BodyNational Green Tribunal (NGT): A specialized body for adjudication of environmental disputes and cases related to all issues under the Environment (Protection) Act, 1986.
BodyTamil Nadu Pollution Control Board (TNPCB): A state-level body responsible for implementing pollution control measures and monitoring industrial waste.
FactThe NGT ordered the implementation of independent audit recommendations within a three-month timeframe from the order date in July 2026.
Mains angle
Q. Examine the institutional challenges in regulating hazardous waste management in India and suggest measures to ensure industrial safety and environmental compliance.
Regulatory oversight gap: Inadequate frequency of mandatory fire safety audits for hazardous waste storage sites.
Inter-agency coordination: Need for seamless integration between pollution control boards and fire rescue services.
Enforcement bottleneck: Difficulty in monitoring independent audit compliance across decentralized industrial clusters.
Why in news: Assam Finance Minister Jayanta Mallabaruah proposed a 'Green Cess' in the 2026-27 budget to fund environmental conservation and sustainable infrastructure.
The proposed Green Cess targets four specific sectors: stone crushers, brick kilns, commercial groundwater extraction, and second-hand vehicle transfers. The revenue is earmarked for afforestation, pollution control, biodiversity conservation, and climate adaptation in Assam.
Prelims pointers (3)
FactGreen Cess proposed for the Assam State Budget for the fiscal year 2026-27
FactTargeted sectors for cess: stone crushers, brick kilns, commercial groundwater extraction, and second-hand vehicle transfers
FactPrimary objectives: afforestation, pollution control, biodiversity conservation, and climate adaptation
Mains angle
Q. Discuss the efficacy of 'Green Cess' as a fiscal tool for environmental conservation in ecologically sensitive states like Assam.
Fiscal decentralization: State-level autonomy in generating revenue for localized ecological restoration
Externalities internalisation: Pricing environmental degradation in industrial activities like brick kilns and stone crushing
Revenue recycling: Ensuring transparent allocation of cess funds toward measurable biodiversity and afforestation targets
Why in news: The National Board for Wildlife (NBWL) expert committee rejected the ₹10,000 crore Sharavathi Pumped Storage Project in Karnataka due to ecological risks.
The project is a ₹10,000 crore pumped storage initiative located in Karnataka. The NBWL expert committee recommended rejection based on habitat fragmentation, wildlife disturbance, and lack of technical/environmental sustainability.
Prelims pointers (3)
BodyNBWL: National Board for Wildlife is a statutory body under the Ministry of Environment, Forest and Climate Change.
FactProject Cost: The Sharavathi Pumped Storage Project is valued at ₹10,000 crore.
PlaceLocation: The project is situated in the state of Karnataka.
Mains angle
Q. Analyze the conflict between large-scale renewable energy infrastructure and biodiversity conservation in India's ecologically sensitive zones.
Ecological fragmentation: Loss of contiguous corridors for flagship species in Western Ghats biodiversity hotspots
Regulatory bottleneck: Balancing the Ministry of Power's infrastructure targets with the Ministry of Environment's conservation mandates
Technical trade-off: High-capacity pumped storage requirements vs. irreversible degradation of local riverine ecosystems
Why in news: Union Environment Minister Bhupender Yadav chaired meetings of key wildlife bodies to review over 100 projects and conservation strategies for the Great Indian Bustard and Greater One-horned Rhinoceros.
The meetings included the Standing Committee of the National Board for Wildlife (NBWL), National Tiger Conservation Authority (NTCA), Central Zoo Authority (CZA), and Wildlife Institute of India Society. A second Great Indian Bustard chick survived the critical period using the 'jumpstart' method.
Prelims pointers (4)
BodyNational Board for Wildlife (NBWL): Statutory body established under the Wildlife (Protection) Act, 1972
EnvironmentGreat Indian Bustard: Critically endangered bird species found in grasslands of Rajasthan and Gujarat
EnvironmentGreater One-horned Rhinoceros: Primarily found in the Kaziranga National Park and Pobitora Wildlife Sanctuary
S&TJumpstart method: A conservation technique used to assist the hatching and survival of endangered species
Mains angle
Q. Discuss the institutional framework for wildlife conservation in India and the role of scientific interventions in preserving critically endangered species like the Great Indian Bustard.
Inter-agency coordination: Streamlining clearance processes between NBWL, NTCA, and CZA for habitat-specific projects
Technological intervention: Balancing high-cost 'jumpstart' methods with large-scale habitat restoration and protection
Regulatory bottleneck: Addressing the backlog of over 100 pending wildlife clearance projects for infrastructure development
Why in news: Scientists detected nanoplastics, including tire-wear particles, in Antarctic soil for the first time, highlighting the reach of atmospheric plastic pollution.
The study, published in Scientific Reports, identified nanoplastics in the McMurdo Dry Valleys of Antarctica. The particles originated from tire wear and common plastic products, indicating both local and long-range atmospheric transport.
Prelims pointers (3)
EnvironmentNanoplastics: Microplastics smaller than 1 micrometer that can penetrate biological membranes.
PlaceMcMurdo Dry Valleys: A large, ice-free valley in Victoria Land, Antarctica.
FactNanoplastics were found in soil despite the lack of permanent human population in the region.
Mains angle
Q. Discuss the implications of transboundary nanoplastic pollution on polar ecosystems and the challenges in establishing a global monitoring framework for micro-pollutants.
Atmospheric transport: Long-range movement of synthetic polymers via wind currents to pristine environments
Ecological risk: Potential for nanoplastics to enter the food chain and affect polar biodiversity
Monitoring gap: Lack of standardized protocols for detecting and quantifying nanoplastics in remote soil samples
Why in news: Retired forest officials and conservationists filed a PIL in the Delhi High Court challenging the National Board for Wildlife (NBWL) for allegedly approving 97% of land diversion proposals between 2014 and 2026.
The petition alleges that the Standing Committee of the NBWL (SC-NBWL) approved over 97% of proposals for diverting or de-notifying protected land between 2014 and 2026. The petitioners seek binding guidelines to ensure transparency and legal compliance in decision-making regarding protected areas.
Prelims pointers (3)
BodyNational Board for Wildlife (NBWL): Statutory body established under the Wildlife (Protection) Act, 1972.
FactThe SC-NBWL reportedly considered over 100 proposals in a single day's meeting during the period under scrutiny.
PlaceDelhi High Court: The forum where the PIL challenging the NBWL's functioning was filed.
Mains angle
Q. Critically analyze the institutional mechanisms for balancing infrastructure development with wildlife conservation in India's protected areas.
Procedural oversight: Lack of binding guidelines for SC-NBWL leading to rapid approval of land diversion proposals.
Transparency deficit: Concerns over the speed of decision-making and public accessibility to deliberation records.
Regulatory friction: Conflict between rapid infrastructure expansion and the statutory mandate of the Wildlife (Protection) Act.
Why in news: A study in Ecological Entomology revealed that bumblebees accumulate significantly higher concentrations of toxic metals than honeybees, highlighting the inadequacy of honeybees as sole indicators for pollinator health.
The study identified higher concentrations of arsenic, chromium, cobalt, lead, and tin in bumblebees compared to honeybees. Differences are attributed to foraging behavior, habitat use, and body hair characteristics.
Prelims pointers (3)
EnvironmentBumblebees and honeybees are key wild pollinators whose health is affected by heavy metal contamination.
FactBumblebees can carry up to seven times more toxic metals than honeybees even when foraging in the same fields.
S&THeavy metals like arsenic, chromium, cobalt, lead, and tin are primary pollutants affecting pollinator biodiversity.
Mains angle
Q. Discuss how heavy metal contamination in agricultural landscapes affects pollinator biodiversity and the implications for food security and ecosystem services.
Indicator limitation: Honeybees may underrepresent the severity of heavy metal toxicity in wild pollinator populations.
Foraging dynamics: Bumblebees' localized foraging behavior increases vulnerability to site-specific soil and pollen contamination.
Ecosystem risk: Bioaccumulation of heavy metals in pollinators can lead to trophic transfer of toxins through the food chain.
Keywords: Bioaccumulation · Pollinator Health · Heavy Metal Toxicity · Ecosystem Services · Biodiversity Conservation
Why in news: Analysis of rising surface air temperatures and increased monsoon variability in India due to climate-induced moisture capacity changes.
India's surface air temperature rose by 0.7°C between 1901 and 2018. Climate change is intensifying monsoon patterns by increasing atmospheric moisture capacity and causing shorter dry spells followed by intense rainfall bursts.
Prelims pointers (3)
FactIndia's surface air temperature rose by 0.7°C during the period 1901-2018.
S&TClimate change increases atmospheric moisture capacity, leading to more intense storm systems.
EnvironmentMonsoon variability in India is characterized by shorter dry spells and intense rainfall bursts.
Mains angle
Q. Discuss how climate-induced changes in monsoon patterns necessitate a shift from traditional disaster management to climate-resilient urban infrastructure planning in India.
Infrastructure mismatch: Existing urban drainage systems are inadequate for high-intensity, short-duration rainfall bursts.
Adaptation gap: Need for localized climate-resilient building codes to mitigate flood risks in high-vulnerability zones.
Data-driven planning: Requirement for high-resolution meteorological modeling to inform municipal spatial planning.
Why in news: NASA researchers utilized satellite imagery to reveal a net increase in global mangrove forests between 2000 and 2020, highlighting the success of restoration efforts against the threat of sea-level rise.
The study analyzed nearly two decades of Earth observation data to track mangrove health. While restoration initiatives have reversed decades of decline, accelerating sea-level rise remains a critical threat to these coastal ecosystems.
Prelims pointers (3)
EnvironmentMangroves: Halophytic trees/shrubs that grow in coastal saline/brackish water.
S&TNASA uses Earth observation satellites to monitor global ecosystem health and resilience.
FactGlobal mangrove forests showed a net increase in area between the years 2000 and 2020.
Mains angle
Q. Discuss the role of coastal ecosystems like mangroves in climate change mitigation and the challenges posed by accelerating sea-level rise to their long-term survival.
Ecological buffer: Mangroves act as natural barriers against storm surges and coastal erosion.
Adaptation bottleneck: Rate of sea-level rise may exceed the natural inland migration capacity of mangrove species.
Sediment dynamics: Importance of sediment management in maintaining the elevation of coastal wetlands against submergence.
Why in news: The India Meteorological Department (IMD) reported a 15.2% deficit in southwest monsoon rainfall, highlighting the growing trend of uneven precipitation and localized extreme weather events.
The southwest monsoon is India's primary source of rainfall, typically occurring from June to September. Current data shows a 15.2% deficit overall, contrasted by intense, localized rainfall in Kerala, Jammu and Kashmir, and Maharashtra causing landslides and floods.
Prelims pointers (3)
BodyIndia Meteorological Department (IMD): The primary agency responsible for monitoring and forecasting monsoon patterns in India.
FactCurrent monsoon deficit: 15.2% below normal as reported by IMD.
PlaceAffected regions: Kerala, Jammu and Kashmir, and Maharashtra reported severe flooding and landslides.
Mains angle
Q. Analyze how the increasing frequency of erratic monsoon patterns and localized extreme weather events poses a challenge to India's disaster management and agricultural stability.
Hydrological imbalance: Rapid runoff from intense short-duration rainfall causing soil erosion and flash floods in hilly terrains.
Agricultural vulnerability: Crop-specific damage due to uneven moisture distribution despite overall monsoon deficits.
Infrastructure stress: Urban drainage systems in Maharashtra and Kerala failing to cope with high-intensity rainfall events.
Why in news: Union Home Minister Amit Shah launched the Delhi Ridge Rejuvenation Campaign to restore the city's ecological 'green lung' through the 'Ek Ped Maa Ke Naam' initiative.
The campaign aims to develop 6,300 hectares of the Green Ridge area into forest land over a four-year period. It involves planting 20.01 lakh trees, 37.07 lakh shrubs, and 92,960 bamboo saplings, with 670 hectares of the Central Ridge declared as 'reserved forest'.
Prelims pointers (4)
Scheme'Ek Ped Maa Ke Naam' is a central initiative for tree plantation and environmental conservation.
FactThe Delhi Ridge Rejuvenation Campaign targets the development of 6,300 hectares of forest land.
PlaceThe Central Ridge and Nanakpura Ridge are key ecological zones in Delhi acting as barriers against desertification.
FactThe campaign includes the distribution of 12.04 lakh saplings to the public for citizen participation.
Mains angle
Q. Discuss the ecological significance of urban forest corridors like the Delhi Ridge in mitigating the impacts of rapid urbanization and desertification.
Ecological buffer: Mitigation of urban heat islands and desertification through dense forestation of the Ridge area.
Community engagement: Leveraging the 'Ek Ped Maa Ke Naam' initiative to foster public participation in urban biodiversity conservation.
Land use conflict: Balancing the expansion of 'reserved forest' zones against the increasing demand for urban infrastructure and housing.
Why in news: A major landslide at the Kozhikode-Wayanad twin-tunnel project site in Kerala highlights the intersection of climate-induced heavy rainfall and geological instability.
The landslide occurred at a road project site in Kerala, triggered by heavy rains and exacerbated by climate change. The Geological Survey of India (GSI) is the primary body responsible for classifying landslide types and monitoring geological hazards in India.
Prelims pointers (3)
BodyGeological Survey of India (GSI): The nodal agency for geological mapping and landslide classification in India.
PlaceWayanad: A district in Kerala prone to landslides due to its hilly terrain and heavy monsoon rainfall.
FactLandslide triggers: Combination of geological instability, heavy rainfall, and human activities like road cutting and poor drainage.
Mains angle
Q. Analyze how the synergy between climate change and unplanned infrastructure development exacerbates landslide vulnerability in India's Himalayan and Western Ghats regions.
Ecological degradation: Loss of vegetative cover and soil cohesion due to unregulated road cutting and construction.
Hydrological imbalance: Poor drainage systems leading to rapid soil saturation and increased pore-water pressure.
Institutional gap: Need for site-specific geological risk assessments and land-use zoning in ecologically sensitive zones.
Why in news: UNEP reports indicate Indian cities are warming at nearly twice the global average rate due to the Urban Heat Island (UHI) effect, necessitating a shift toward climate-responsive urban planning.
The Urban Heat Island (UHI) effect occurs when urban areas experience significantly higher temperatures than surrounding rural areas due to human activity and infrastructure. UNEP highlights that rapid urbanization in India is a primary driver of this localized warming trend.
Prelims pointers (3)
FactUrban areas are warming at nearly twice the global average rate according to UNEP.
S&TPassive cooling techniques involve architectural designs that reduce heat gain without relying on mechanical air conditioning.
EnvironmentNature-based solutions include the integration of green infrastructure and reflective surfaces to mitigate UHI effects.
Mains angle
Q. Discuss how the Urban Heat Island effect poses a threat to urban livability in India and suggest architectural and planning interventions to mitigate these thermal risks.
Infrastructure bottleneck: High prevalence of heat-absorbing concrete and asphalt surfaces in unplanned urban expansions.
Policy-design gap: Lack of mandatory building codes for passive cooling and reflective materials in municipal planning.
Resource trade-off: High energy demand for mechanical cooling vs. the long-term sustainability of nature-based cooling solutions.
Why in news: A study by the Central University of Kerala highlights that sacred groves in the Western Ghats support higher predator activity and biodiversity than human-managed plantations.
Researchers used plasticine caterpillar models and dead mealworms to monitor predation rates in Kasaragod district over a two-year period. The study, published in the Journal of Applied Ecology, found that these traditional forest relics provide essential ecosystem services like natural pest control.
Prelims pointers (3)
PlaceKasaragod district is located in the state of Kerala, part of the Western Ghats biodiversity hotspot.
EnvironmentSacred groves are traditional forest relics protected by local communities through religious and cultural beliefs.
FactThe study confirmed that sacred groves outperform human-managed plantations in supporting predator activity and biodiversity.
Mains angle
Q. Discuss the role of traditional community-led conservation models, like sacred groves, in preserving biodiversity and providing ecosystem services in India's biodiversity hotspots.
Ecological resilience: Higher predator activity in sacred groves facilitates natural pest control and maintains trophic balance.
Keywords: Sacred Groves · Biodiversity Hotspots · Ecosystem Services · Community Conservation · Trophic Balance · Western Ghats
Why in news: Ladakh launched the Environment Protection Force (EPF) comprising 100 ex-servicemen to patrol ecologically sensitive zones and penalize environmental violations.
The EPF consists of 100 retired personnel from the Indian Army, paramilitary forces, and Ladakh Scouts. The force is authorized to issue on-the-spot challans, including fines of up to ₹2 lakh for activities like illegal off-roading and littering.
Prelims pointers (3)
PlaceLadakh: A Union Territory in northern India known for high-altitude cold deserts and fragile ecosystems.
FactEPF: A newly formed force in Ladakh specifically tasked with patrolling ecologically sensitive areas.
FactFine amount: Tourists can be fined up to ₹2 lakh for environmental violations like littering and habitat disturbance.
Mains angle
Q. Discuss the challenges of balancing large-scale tourism with ecological preservation in fragile high-altitude ecosystems like Ladakh.
Regulatory enforcement gap: Difficulty in monitoring remote, high-altitude terrains for illegal off-roading and waste dumping.
Eco-tourism trade-off: Balancing the economic benefits of tourism with the irreversible degradation of fragile alpine biodiversity.
Community-led conservation: Potential for ex-servicemen to act as a bridge between state enforcement and local ecological stewardship.
Why in news: A study by the European Geosciences Union (EGU) reveals that the loss of 2 million sq km of Antarctic sea ice is accelerating global warming by altering cloud cover and heat distribution.
The European Geosciences Union (EGU) study links Antarctic sea ice loss to changes in cloud cover. This feedback loop increases ocean heat absorption and accelerates sea level rise beyond the Antarctic region.
Prelims pointers (3)
EnvironmentAntarctic sea ice loss is linked to altered cloud cover and atmospheric heat distribution.
FactThe study identifies a loss of approximately 2 million sq km of sea ice in the Antarctic region.
S&TOcean heat absorption is a primary driver of accelerated sea level rise linked to polar ice melt.
Mains angle
Q. Analyze how the loss of Antarctic sea ice creates a positive feedback loop in global climate systems and discuss measures to mitigate these impacts.
Atmospheric feedback: Altered cloud cover patterns influencing global heat distribution and radiative forcing
Oceanic thermal expansion: Increased heat absorption by oceans accelerating global sea level rise
Mitigation urgency: The non-linear relationship between polar ice melt and global temperature thresholds
Why in news: The Environment Ministry marked the 18th anniversary of tiger reintroductions at Sariska Tiger Reserve while addressing habitat loss and the ban on 16 fixed-dose combination (FDC) drugs.
The government is prioritizing interventions in 25 tiger reserves where tiger populations are currently scarce. The ban on 16 FDC drugs aims to mitigate risks from irrational drug combinations and promote evidence-based medicine.
Prelims pointers (3)
EnvironmentSariska Tiger Reserve: Located in Rajasthan, notable for tiger reintroduction programs.
FactThe government is prioritizing interventions in 25 tiger reserves with scarce tiger populations.
S&TFixed-Dose Combination (FDC) drugs: Medications containing two or more active pharmaceutical ingredients in a single dosage form.
Mains angle
Q. Discuss the ecological challenges of managing tiger dispersal in fragmented habitats and suggest measures to ensure the sustainability of 'source populations' in tiger reserves.
Habitat fragmentation: Loss of corridor connectivity leading to genetic isolation and increased human-wildlife conflict
Prey base depletion: Scarcity of natural prey forcing tigers into agricultural zones and livestock predation
Regulatory oversight: Balancing the accessibility of affordable FDC drugs with the necessity of evidence-based pharmaceutical safety
Why in news: The World Meteorological Organization (WMO) warned that intensifying El Niño conditions are likely to trigger extreme weather events, including droughts and heatwaves, impacting India's monsoon patterns.
The WMO reported that India experienced its 5th driest June in 126 years. The current El Niño cycle is projected to intensify into a strong event between July and September, potentially delaying monsoon onset in regions like New Delhi.
Prelims pointers (3)
S&TEl Niño: A climate pattern characterized by the unusual warming of surface waters in the eastern tropical Pacific Ocean.
FactIndia recorded its 5th driest June in a 126-year period as of 2024.
BodyWorld Meteorological Organization (WMO): A specialized agency of the United Nationsfocused on meteorology, climatology, and hydrology.
Mains angle
Q. Analyze how the intensification of El Niño impacts India's agricultural stability and suggest measures to mitigate the risks of extreme weather events on food security.
Hydrological stress: Reduced monsoon reliability leading to groundwater depletion and crop failure in rain-fed agricultural zones.
Economic vulnerability: High sensitivity of the rural economy to erratic rainfall patterns and heat-induced yield losses.
Climate adaptation: Need for heat-resistant crop varieties and advanced early-warning systems for localized drought management.
Why in news: Delhi's first scientific city-wide tree census is delayed despite a Supreme Court order, highlighting a lack of data on urban tree health and safety.
The census aims to create a national capital database recording tree species, age, health, and geolocation. Delays are attributed to methodological disagreements between the Forest Research Institute (FRI), Dehradun, and the Delhi Forest Department.
Prelims pointers (3)
BodyForest Research Institute (FRI) is located in Dehradun, Uttarakhand
FactThe tree census project aims to record species, age, health, and geolocation of urban trees
PlaceDelhi's tree census is a city-wide initiative for the National Capital Territory
Mains angle
Q. Discuss the importance of scientific urban forestry and data-driven conservation in mitigating risks to public safety and enhancing urban biodiversity in Indian cities.
Data deficit: Absence of a centralized database on tree health hinders proactive risk assessment and emergency response
Urban safety risk: Lack of geolocation and health mapping increases vulnerability to falling trees in densely populated areas
Why in news: Global ocean surface temperatures reached record highs in June, surpassing the 2023-24 El Niño levels due to greenhouse gas accumulation.
Average sea surface temperatures reached just under 21 degrees Celsius. The warming is driven by heat trapped by greenhouse gases from fossil fuel combustion and is being exacerbated by a developing El Niño event in the tropical Pacific.
Prelims pointers (3)
FactAverage sea surface temperature reached just under 21 degrees Celsius in June.
S&TEl Niño: A climate pattern characterized by the unusual warming of surface waters in the eastern tropical Pacific Ocean.
EnvironmentMarine heatwaves: Periods of abnormally high sea temperatures that cause coral bleaching and disrupt marine biodiversity.
Mains angle
Q. Discuss how the synergy between anthropogenic global warming and natural oscillations like El Niño poses a systemic threat to marine biodiversity and coastal livelihoods.
Ecological degradation: Accelerated coral bleaching and mass mortality of temperature-sensitive marine species.
Coastal vulnerability: Increased frequency of intense marine heatwaves threatening artisanal fisheries and coastal infrastructure.
Forecasting limitations: Need for high-resolution oceanic heat content monitoring to improve early warning systems for extreme weather.
Keywords: Anthropogenic warming · Marine heatwaves · Greenhouse gas forcing · El Niño Southern Oscillation · Biodiversity loss
Why in news: The Delhi government launched an ₹8,300 crore air pollution mitigation plan (2023-2033) supported by the World Bank to combat vehicular and construction emissions.
The plan covers a seven-year period from September 2023 to August 2033. It involves a dedicated Project Management Unit (PMU) and focuses on electric vehicle (EV) adoption, dust control, and municipal solid waste management.
Prelims pointers (4)
FactTotal estimated cost of the Delhi air pollution mitigation plan is ₹8,300 crore.
BodyThe World Bank is providing financial and technical support for the project.
FactThe implementation timeline is set from September 2023 to August 2033.
PlaceThe project is specifically targeted at the National Capital Territory of Delhi.
Mains angle
Q. Examine the effectiveness of multi-modal pollution mitigation strategies in urban centers like Delhi. How can international funding facilitate sustainable governance of air quality?
Institutional bottleneck: Coordination challenges between municipal bodies and the dedicated Project Management Unit (PMU)
Technological transition: High upfront costs of EV infrastructure vs. long-term reduction in particulate matter (PM2.5)
Governance friction: Balancing rapid urban construction demands with stringent dust control and waste management mandates
Why in news: Copernicus data indicates that 2026 has surpassed 2024 as the hottest year on record, highlighting the accelerating impact of global warming and El Niño.
The Copernicus Climate Change Service reported a daily average surface air temperature of 16.80 degrees Celsius on June 30, 2026. The Arctic region is currently experiencing the fastest warming rates globally, with Europe and Asia showing higher heating rates than other continents.
Prelims pointers (4)
FactDaily average surface air temperature reached 16.80 degrees Celsius on June 30, 2026
BodyCopernicus: The European Union's Earth observation programme providing climate data
EnvironmentArctic region is experiencing the fastest warming rates globally
FactOcean surface temperatures reached record levels due to warming and El Niño effects
Mains angle
Q. Discuss the implications of accelerated Arctic warming on global climate patterns and the increasing frequency of extreme heat stress events.
Arctic feedback loop: Rapid ice melt reducing albedo and accelerating global atmospheric warming
Heat stress vulnerability: Rising frequency of humid heat days exceeding human physiological adaptation limits
Regional disparity: Accelerated warming in Europe and Asia compared to other continents creating uneven climate adaptation needs
Why in news: HMWSSB is reviewing a 1 MLD Bio-Lace sewage treatment pilot project in Fatehnagar to mitigate pollution in the Musi River.
The Bio-Lace technology was developed by Japan International Cooperation Agency (JICA) and Euroclean TBR. It utilizes a natural microbial process to purify polluted canal water without the use of chemicals.
Prelims pointers (4)
S&TBio-Lace technology: A microbial-based sewage treatment process that reduces BOD and TSS levels.
BodyJICA: Japan International Cooperation Agency, a multilateral agency providing technical cooperation.
PlaceMusi River: A major river in Telangana, currently facing significant sewage pollution issues.
FactPilot project capacity: 1 MLD (Million Litres per Day) in Fatehnagar.
Mains angle
Q. Discuss how decentralized, nature-based wastewater treatment technologies like Bio-Lace can address the challenges of urban river rejuvenation in rapidly expanding Indian cities.
Operational scalability: High capital costs of microbial reactor maintenance vs. traditional chemical treatment methods
Ecological restoration: Effectiveness of microbial processes in restoring dissolved oxygen levels in heavily polluted urban water bodies
Institutional coordination: Need for integrated urban planning between municipal bodies and environmental regulatory agencies
Keywords: Nature-based solutions · Urban river rejuvenation · Microbial treatment · BOD and TSS reduction · Decentralized waste management
Why in news: Union Environment Minister Bhupender Yadav highlighted the success of the Sariska tiger reintroduction program during its 18th anniversary, noting a current population of 56 tigers.
The Sariska tiger reintroduction program has completed 18 years of operation. As of the current reporting, the tiger population in the Sariska Tiger Reserve has reached 56 individuals.
Prelims pointers (3)
EnvironmentSariska Tiger Reserve is a major tiger habitat located in the Alwar district of Rajasthan.
FactThe current tiger population in Sariska is 56 as of the 18th anniversary of the reintroduction program.
BodyThe tiger reintroduction program is managed under the Project Tiger initiative by the Ministry of Environment, Forest and Climate Change.
Mains angle
Q. Analyze the ecological and socio-economic challenges involved in tiger reintroduction programs in fragmented habitats like Sariska.
Habitat fragmentation: Difficulty in maintaining genetic diversity and corridor connectivity in restricted geographical areas
Human-wildlife conflict: Managing livestock predation and local community grievances in proximity to tiger habitats
Monitoring limitations: Challenges in accurate population estimation and poaching prevention in dense forest cover
Why in news: The Delhi Government introduced a new EV policy to curb PM2.5 emissions by phasing out petrol and CNG registrations for two and three-wheelers.
The policy mandates a ban on new petrol-powered two-wheeler registrations starting April 2028. It also seeks to restrict new CNG-powered three-wheeler registrations by the end of 2024.
Prelims pointers (3)
FactPM2.5: Primary pollutant targeted by the Delhi EV policy to reduce transport-related emissions.
FactApril 2028: Deadline for stopping new petrol-powered two-wheeler registrations in Delhi.
FactDecember 2024: Target date for restricting new CNG-powered three-wheeler registrations.
Mains angle
Q. Analyze the effectiveness of vehicle-specific registration bans as a strategy to combat urban air pollution in the National Capital Region.
Infrastructure gap: Insufficient public charging density for high-frequency commercial three-wheeler routes
Economic friction: High upfront acquisition costs for electric vehicles compared to subsidized CNG alternatives
Regulatory hurdle: Lack of standardized battery swapping protocols for last-mile delivery fleets
Keywords: PM2.5 emissions · decarbonization · urban air quality · transportation policy · EV adoption
Why in news: The Kerala High Court initiated a suo motu PIL regarding large-scale tree felling and unauthorized construction on 296 acres of cardamom land in Idukki.
The Kerala High Court took cognizance of the destruction of virgin forest land for cardamom cultivation in Gudanpara Estate, Idukki. The Forest Department has registered three cases regarding the felling of rare tree species on 296 acres of cardamom title land.
Prelims pointers (3)
PlaceIdukki: A district in Kerala known for cardamom cultivation and high biodiversity.
Fact296 acres: The specific area of cardamom title land under scrutiny for unauthorized construction and tree felling.
BodyKerala High Court: The judicial body that initiated the suo motu Public Interest Litigation (PIL).
Mains angle
Q. Discuss the conflict between commercial agricultural expansion and forest conservation in ecologically sensitive zones like the Western Ghats.
Regulatory oversight: Weak enforcement of forest conservation laws against private landholders in ecologically sensitive zones.
Biodiversity loss: Irreversible destruction of virgin forest habitats and rare tree species for monoculture cardamom cultivation.
Judicial activism: The role of the High Court in addressing environmental degradation through suo motu actions.
Keywords: Suo motu · Ecologically sensitive zones · Biodiversity conservation · Judicial activism · Monoculture cultivation
Why in news: The Copernicus Marine Service reported that June 2023 recorded the hottest global sea surface temperatures ever, signaling a potential new phase of ocean warming driven by El Niño and climate change.
The Copernicus Marine Service (EU) recorded a global sea surface temperature of 21.0 degrees Celsius (69.8 degrees Fahrenheit) in June 2023. This represents the warmest June on record, attributed to the synergistic effects of the El Niño phenomenon and anthropogenic climate change.
Prelims pointers (3)
FactJune 2023 recorded a global sea surface temperature of 21.0 degrees Celsius.
BodyCopernicus Marine Service is a component of the European Union's Copernicus programme.
S&TEl Niño is a climate pattern characterized by the warming of surface waters in the eastern tropical Pacific Ocean.
Mains angle
Q. Discuss how rising global sea surface temperatures impact marine biodiversity and coastal ecosystems, and evaluate the role of international cooperation in mitigating ocean warming.
Ecological disruption: Thermal stress leading to coral bleaching and mass mortality of marine species.
Why in news: Assam launched a state-wide enforcement campaign to dismantle illegal sawmills to curb the illegal timber trade and protect forest resources.
The Forest Department of Assam is inspecting all forest divisions to seize illegally processed timber and shut down unauthorized units. The initiative involves mandatory geo-tagged reporting and daily progress updates to ensure transparency in enforcement.
Prelims pointers (3)
PlaceAssam: State in Northeast India facing significant forest cover loss due to illegal timber trade
FactThe campaign aims to identify and dismantle all illegal sawmills within a one-week timeframe from the launch
BodyForest Department: State body responsible for forest conservation and timber regulation
Mains angle
Q. Discuss the institutional and logistical challenges in curbing illegal timber trade in ecologically sensitive zones like Assam and suggest measures for effective forest governance.
Enforcement gap: Difficulty in monitoring remote forest divisions and identifying clandestine timber processing units
Regulatory friction: Balancing local livelihoods dependent on timber with state-level conservation mandates
Transparency deficit: Need for real-time geo-tagged monitoring to prevent collusion between local officials and timber mafias
Why in news: The India Meteorological Department (IMD) issued a forecast predicting below-normal rainfall for July 2024 following a significant rainfall deficit in June.
The IMD reported a 40% rainfall deficit in June 2024 against a previous forecast of 92% of the long period average. For July 2024, rainfall is projected to be less than 94% of the long period average, influenced by strengthening El Nino conditions.
Prelims pointers (4)
S&TEl Nino: A climate pattern characterized by the warming of surface waters in the eastern tropical Pacific Ocean.
FactJune 2024 rainfall was approximately 60% of the long period average.
FactJuly 2024 rainfall is projected to be less than 94% of the long period average.
BodyIMD: The primary agency in India responsible for meteorological observations and forecasting.
Mains angle
Q. Discuss the impact of El Nino and La Nina phenomena on the Indian monsoon and suggest measures to mitigate the socio-economic risks of erratic rainfall patterns.
Agricultural vulnerability: Risk of crop failure and reduced yields in rain-fed farming regions due to rainfall deficits.
Hydrological stress: Reduced groundwater recharge and surface water availability affecting drinking water security in arid zones.
Economic volatility: Impact of erratic monsoons on rural demand and food price inflation in the domestic market.
Why in news: The India Meteorological Department (IMD) reported that June 2026 recorded the third driest monsoon rainfall in a century due to El Niño-like conditions.
June 2026 recorded only 60% of normal rainfall, a sharp decline from 109% in June 2025. The IMD identified El Niño-like conditions and uneven low-pressure system development as primary drivers for the deficit in Northwest India.
Prelims pointers (4)
FactJune 2026 rainfall was 60% of the normal average.
S&TEl Niño is a climate pattern characterized by the warming of surface waters in the eastern tropical Pacific Ocean.
BodyIndia Meteorological Department (IMD) is the national agency responsible for monitoring and forecasting monsoon patterns.
PlaceNorthwest India states affected by the 2026 deficit include Haryana, Punjab, Rajasthan, and Delhi.
Mains angle
Q. Analyze how El Niño-like conditions and erratic low-pressure systems impact India's monsoon patterns and suggest measures to mitigate agricultural risks from rainfall variability.
Climate vulnerability: High dependence of the agrarian economy on the Southwest Monsoon's spatial and temporal consistency.
Meteorological complexity: Difficulty in predicting localized rainfall spells due to uneven low-pressure system development.
Adaptive infrastructure: Need for robust water harvesting and irrigation systems to buffer against extreme rainfall deficits.