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Subject: Environment

  • Thermal Power Plants Near Delhi Operating Without FGD

    Why in the news?

    Delhi’s air quality deteriorated sharply in November 2025. A major contributing factor identified is the continued operation of several thermal power plant units within a 300-km radius of Delhi without Flue Gas Desulphurisation (FGD) systems.

    What is FGD?

    Flue Gas Desulphurisation (FGD) is a pollution-control technology used in thermal power plants and industrial units to remove sulphur dioxide (SO₂) from exhaust flue gases before they are released into the atmosphere.

    Status of FGD Installation 

    Thermal Power Plants within 300 km of Delhi

    • Total plants: 11
    • Total units: 35
    • Units with FGD (as of Apr 2025): 13
    • Units without FGD: 22
    • Units currently operating without FGD (Nov 2025): 15
    • Units shut/reserve shutdown: 6

    States & Operators

    • Haryana (HPGCL): Panipat TPS, Yamuna Nagar TPS.
    • Punjab (PSPCL): Guru Hargobind TPS and Ropar TPS.
    • Private: Talwandi Sabo (Vedanta).

    Why SO₂ Emissions Matter?  

    • SO₂ converts into secondary PM2.5, the most harmful pollutant for human health.
    • Causes: Respiratory diseases, Acid rain and Visibility reduction (smog)
    • Travels long distances, affecting entire regions beyond plant boundaries.
    According to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur dioxide emissions? (2024)

    (a) Locomotives using fossil fuels 

    (b) Ships using fossil fuels 

    (c) Extraction of metals from ores 

    (d) Power plants using fossil fuels

  • Low-Pressure Area in Bay of Bengal (November 2025) 

    Why in the news?

    According to the India Meteorological Department (IMD), a low-pressure area formed over the Bay of Bengal on November 22, 2025. It is expected to intensify into a depression by November 24 and move west-northwestwards.

    What Has the IMD Reported?  

    a) Formation: Low-pressure area formed near the Malacca Strait over the South Andaman Sea. It arose due to a cyclonic circulation.

    b) Likely Path: Expected to move west-northwestwards. Likely to intensify into a depression over southeast Bay of Bengal & adjoining south Andaman Sea by November 24.

    c) Further IntensificationCould intensify further over the southwest Bay of Bengal within 48 hours after formation. IMD is uncertain whether it will develop into a cyclonic storm.

    d) State Impact (Odisha & Coastal Areas): System is far from Odisha coast → dry weather Farmers in coastal and southern regions have started harvesting mature paddy in anticipation of possible heavy rains. The State Agriculture Department has not yet issued advisories.

    (2015) In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason? 

    (a) Sea surface temperatures are low 

    (b) Inter-Tropical Convergence Zone seldom occurs 

    (c) Coriolis force is too weak 

    (d) Absence of land in those regions

  • CPCB to monitor Yamuna with Delhi and Haryana

    Why In The News?

    Drain water overflow is contaminating the Yamuna, prompting the National Mission for Clean Ganga (NMCG) to inform the National Green Tribunal (NGT) that the Central Pollution Control Board (CPCB), Delhi Pollution Control Committee (DPCC), and Haryana State Pollution Control Board (HSPCB) will jointly conduct quarterly monitoring to track pollution and coordinate corrective action.

    1) About National Mission for Clean Ganga (NMCG):

    • Legal Status: The NMCG is a registered society under the Ministry of Jal Shakti to prevent, control, and abate pollution in the Ganga River and ensure adequate ecological flow.
    • Origin: It functioned as the implementation arm of the National Ganga River Basin Authority (NGRBA) under the Environment (Protection) Act, 1986 until the NGRBA was replaced by the National Ganga Council in 2016.
    • Objectives:
      • Ensure pollution abatement and rejuvenation of the Ganga through a river basin approach.
      • Maintain minimum ecological flows for water quality and sustainable development.
    • Structure:
      • Has a two-tier structure: a Governing Council and an Executive Committee, both headed by the Director General (DG).
      • The Executive Committee can approve projects up to ₹1000 crores.
      • State Programme Management Groups (SPMGs) act as implementing arms at the state level.
      • The DG is an Additional Secretary in the Government of India.

    2) About National Green Tribunal (NGT):

    • Purpose: The NGT ensures efficient and expert resolution of environmental disputes and aims to resolve cases within six months.
    • Independence: Operates based on principles of natural justice, not the Civil Procedure Code, 1908, enabling faster decisions.
    • Jurisdiction: Began functioning in 2011 with its principal bench in New Delhi and regional benches in Bhopal, Pune, Kolkata, and Chennai. It follows a circuit procedure for accessibility.
    • Composition:
      • Chairperson: Retired Supreme Court Judge or Chief Justice of a High Court, appointed by the Central Government.
      • Judicial Members: 10-20 judges from the Supreme Court or High Courts.
      • Expert Members: 10-20 experts with advanced degrees in Science/Engineering/Technology and environmental experience.
    • Powers & Jurisdiction:
      • Handles civil cases under major environmental laws such as the Water Act 1974, Air Act 1981, Environment Protection Act 1986, Forest Conservation Act 1980, Biological Diversity Act 2002, and Public Liability Insurance Act 1991.
      • Can impose penalties, act as a Civil Court, and follow the Bharatiya Nyaya Sanhita (BNS) for certain procedures.
      • Has suo motu powers to take up environmental issues on its own.
      • Can award compensation, order remediation, and ensure time-bound disposal of cases.

    3) About Central Pollution Control Board (CPCB):

    • Establishment: The CPCB is a statutory organisation created under the Water (Prevention and Control of Pollution) Act, 1974, and later empowered under the Air (Prevention and Control of Pollution) Act, 1981.
    • Role: Acts as a technical arm of the Ministry of Environment, Forest and Climate Change (MoEFCC) for enforcing the Environment (Protection) Act, 1986.
    • Functions:
      • Promote cleanliness of streams and wells and control water pollution.
      • Improve air quality and abate air pollution nationwide.
      • Advise the Central Government on pollution control and coordinate with State Pollution Control Boards (SPCBs).
      • Offer guidance, technical support, and help resolve conflicts among SPCBs.
    • Delegated Powers: CPCB delegates its authority under the Water Act, Water Cess Act (1977), and Air Act to regional administrations in Union Territories.
    • Standards & Guidelines:
      • Develops standards for ambient air quality, water quality, and industrial emissions.
      • Prepares manuals, codes, and guidelines for sewage treatment, effluent disposal, and pollution-control devices.
      • Issues Minimal National Standards (MINAS) for various industries regarding effluents, emissions, noise, and waste.
    [UPSC 2016] Which of the following are the key features of ‘National Ganga River Basin Authority (NGRBA)?,

    1. River basin is the unit of planning and management.,

    2. It spearheads the river conservation efforts at the national level.,

    3. One of the Chief Ministers of the States through which the Ganga flows becomes the Chairman of NGRBA on rotation basis.,

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

  • Crop-residue burning turning India into global methane hotspot, UN report warns

    Why In The News?

    India has been identified as a major methane-emission hotspot from crop-residue burning, according to a UN report released on November 17, 2025 at COP30 in Belem, Brazil. Stubble burning, already a key air-pollution source, is now flagged as a major climate threat, and reducing it would benefit both public health and the climate.

    1) Key Findings of the Report:

    • Global Ranking: India is the world’s third-largest methane emitter after China and the United States, releasing 31 million tonnes annually.
    • G20 Contribution: The G20 countries, including India, account for 65% of global methane emissions, while total global emissions are 360 million tonnes per year.
    • Future Outlook: The report notes that although methane levels are rising, emissions could decline by 2030 with strong mitigation efforts.
    • Climate & Food Benefits: Reducing methane is one of the fastest and most effective climate actions, also lowering crop losses and improving food security, as highlighted by UNEP Executive Director Inger Andersen.

    2) India’s Methane Profile:

    • Major Sources: India’s key methane sources include livestock (enteric fermentation, manure) and rice cultivation, with crop-residue burning becoming a major emerging hotspot.
    • Waste-Management Impact: Waste-burning methane emissions increased from 4.5 million tonnes (1995) to 7.4 million tonnes (2020) – a 64% rise, compared to a 43% global increase.
    • Sector-wise Emissions (2020): India generated 20 million tonnes of methane from agriculture and 4.5 million tonnes from the energy sector in 2020.

    3) About Methane:

    • Basic Definition: Methane is the simplest hydrocarbon, made of one carbon and four hydrogen atoms (CH₄).
    • Key Properties: It is odourless, colourless, tasteless, lighter than air, and burns with a blue flame during complete combustion, producing CO₂ and H₂O.
    • Role as Natural Gas: Methane is the primary component of natural gas, widely used as a fuel.
    • Greenhouse Gas Importance: Methane is the second most important greenhouse gas after carbon dioxide (CO₂).
    • Global Warming Potential: It has a 20-year GWP of 84, meaning it traps 84 times more heat than CO₂ over the same period.
    • Atmospheric Lifetime: Although highly potent, methane is short-lived in the atmosphere compared to CO₂.
    • Contribution to Warming: It is responsible for about 30% of global temperature rise since the pre-industrial era.
    • Ozone Formation: Methane also helps form ground-level ozone, a harmful pollutant.

    4) Global Methane Pledge(GMP):

    • About the Pledge: Launched at COP26 (2021) by the United States and the European Union to catalyse action on methane reduction.
    • Membership: Nearly 130 countries have joined; collectively responsible for 45% of global human-caused methane emissions.
    • Targets: Countries commit to reduce methane emissions by at least 30% below 2020 levels by 2030.
    • Climate Impact: A 30% reduction could avoid 0.2°C warming by 2050, supporting the 1.5°C target.
    • India’s Status: India is not a participant, despite being among the top five global methane emitters, mainly from agriculture.

    5) Global Methane Initiative (GMI):

    • Nature of Initiative: An international public-private partnership promoting methane recovery and use as a clean energy source.
    • Technical Support: Provides technical assistance to implement methane-to-energy projects worldwide.
    • Country Participation: Helps partner nations deploy methane utilisation projects; India is a partner country.

    6) Methane Alert and Response System (MARS):

    • Purpose: A data-to-action system delivering reliable and actionable methane-emission data for mitigation.
    • Launch: Announced at COP27 (2022); pilot phase began in January 2023.
    • Technology: Uses satellite-based detection to identify major methane sources globally.
    • Action Mechanism: Provides notifications to countries and companies, enabling rapid response and emission reduction.
    • Partnerships: Operates with the Climate and Clean Air Coalition (CCAC) and the International Energy Agency (IEA).
    • Core Components: Detection, notification, response, and progress tracking for emission control.

    7) International Methane Emissions Observatory (IMEO):

    • Establishment: Launched at the G20 Leaders’ Summit (2021).
    • Initial Focus: Concentrated on methane emissions from the fossil fuel sector.
    • Data Integration: Combines information from scientific studies, satellites (via MARS), OGMP 2.0 reporting, and national inventories.
    • OGMP 2.0 Role: UNEP’s flagship programme to enhance accuracy and transparency of methane reporting in the oil and gas industry.

     

    [UPSC 2019] Consider the following:

    1. Carbon monoxide

    2. Methane

    3. Ozone

    4. Sulphur dioxide

    Which of the above are released into atmosphere due to the burning of crop/biomass residue?

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

     

  • NCDC flags study on rising antibiotic resistance in India

    Why In The News?

    The NCDC has rejected a Lancet study claiming that over 50% of Indian patients undergoing a specific gastrointestinal procedure are colonised with multidrug-resistant organisms (MDROs), calling the findings inaccurate.

    1) What is Antibiotic Resistance:

    • Definition: Antimicrobial Resistance (AMR) occurs when microorganisms (bacteria, viruses, fungi, parasites) become resistant to antimicrobial drugs such as antibiotics, antifungals, antivirals, antimalarials, and anthelmintics.
    • Impact on Treatment: Standard treatments become ineffective, leading to persistent infections that can spread to others.
    • Natural Phenomenon: Resistance develops naturally as bacteria evolve, reducing the effectiveness of drugs.
    • Superbugs: Microorganisms that develop AMR are often called “superbugs.”
    • Global Threat: The WHO identifies AMR as one of the top ten global health threats.

    2) Causes of Antibiotic Resistance:

    • High Disease Burden: A high prevalence of communicable diseases (tuberculosis, diarrhoea, respiratory infections) increases antimicrobial use.
    • Weak Public Health System: An overburdened health system limits diagnostic capacity, leading to improper treatment.
    • Poor Infection Control: Hygiene lapses in hospitals and clinics promote the spread of resistant bacteria.
    • Misuse of Antibiotics: Overprescription, self-medication, incomplete antibiotic courses, and unnecessary use of broad-spectrum antibiotics accelerate resistance.
    • Easy Access: Unregulated over-the-counter antibiotic availability increases inappropriate use.
    • Lack of Awareness: Low public awareness about AMR contributes to misuse of antibiotics.
    • Inadequate Surveillance: Limited monitoring systems hinder tracking and understanding of AMR spread.

    3) Implications of AMR:

    • Healthcare Impact: AMR makes previously effective antibiotics ineffective, causing prolonged illnesses, severe symptoms, and higher mortality from common infections such as pneumonia, UTIs, and skin infections.
    • Increased Healthcare Costs: Resistant infections require costlier drugs, longer hospital stays, and sometimes invasive procedures, raising expenses for patients, health systems, and governments.
    • Challenges in Medical Procedures: AMR increases risks in surgeries, chemotherapy, and organ transplants because infections may not respond to standard antibiotics.
    • Limitations in Treatment Options: Growing resistance reduces the availability of effective antibiotics, potentially creating a post-antibiotic era where common infections become untreatable and potentially fatal.

    4) About National Centre for Disease Control (NCDC):

    • Organizational Affiliation: NCDC functions under the Indian Directorate General of Health Services, Ministry of Health and Family Welfare.
    • Purpose: Established as a national centre of excellence for the control of communicable diseases.
    • Leadership: The Director, an officer of the Public Health sub-cadre of Central Health Service, serves as the administrative and technical head of the institute.
    • Headquarters: Located in New Delhi.
    • Branches: NCDC has 8 regional branches at Alwar (Rajasthan), Bengaluru (Karnataka), Kozhikode (Kerala), Coonoor (Tamil Nadu), Jagdalpur (Chhattisgarh), Patna (Bihar), Rajahmundry (Andhra Pradesh), and Varanasi (Uttar Pradesh).
    [UPSC 2019] Which of the following are the reasons for the occurrence of multi-drug resistance in microbial pathogens in India?

    1. Genetic predisposition of some people

    2. Taking incorrect doses of antibiotics to cure diseases

    3. Using antibiotics in livestock farming

    4. Multiple chronic diseases in some people

    Select the correct answer using the code given below. Options: (a) 1 and 2 (b) 2 and 3 only* (c) 1, 3 and 4 (d) 2, 3 and 4

     

  • SC allows CAQM to take ‘proactive’ measures to curb Delhi air pollution

    Why In The News?

    The Supreme Court allowed CAQM full freedom to take proactive anti-pollution measures in Delhi-NCR, including applying GRAP-IV options like work-from-home and 50% office attendance during the ongoing GRAP-III stage.

    About the Judgement:

    • Supreme Court’s Direction: SC empowered CAQM to take proactive pollution-control measures in Delhi-NCR.
    • Bench Observation: CJI Gavai urged stakeholder consultation.
    • Key Proposals: Early use of GRAP-IV measures, vehicle exemptions, staggered timings, and congestion control.
    • Additional Proposals: CAQM proposed advancing GRAP measures, enforcing congestion control, notifying vehicle aggregator policies, reviewing school sports during pollution months, and adopting long-term steps like EV policy review and higher charges on luxury diesel SUVs

    2) What is CAQM (Commission for Air Quality Management)?

    • About: A statutory body managing air quality in Delhi-NCR and adjoining areas, created under the CAQM Act, 2021, replacing the earlier EPCA (1998) and initially introduced via a 2020 ordinance.
    • Structure: Chairperson is a senior government official (Secretary/Chief Secretary); includes 5 ex-officio members from Delhi, Punjab, Haryana, Rajasthan, Uttar Pradesh; 3 full-time technical members; 3 NGO members; supported technically by CPCB, ISRO, and NITI Aayog.
    • Functions: Responsible for monitoring, coordinating, and implementing air quality policies, researching pollution sources, proposing mitigation strategies, and raising public awareness.
    • Powers: Holds jurisdiction over Delhi, Punjab, Haryana, Uttar Pradesh, Rajasthan; can issue binding directions, restrict polluting activities, enforce environmental rules, act against non-compliance, and initiate complaints under the CAQM Act, 2021.

    3) What is GRAP (Graded Response Action Plan)?

    • About: A pre-emptive and emergency framework to control Delhi-NCR air pollution; created under Supreme Court directions in C. Mehta vs Union of India (2016); notified in 2017 and implemented by CAQM, MoEFCC, and State authorities; operates through four graded stages linked to AQI levels.
    • Stages of GRAP:
      Stage I – Poor (AQI 201–300): Road dust control and enforcement of PUC norms.
      Stage II – Very Poor (AQI 301–400): Limits on diesel generators and actions in pollution hotspots.
      Stage III – Severe (AQI 401–450): Vehicle restrictions, construction curbs, and remote schooling
      Stage IV – Severe+ (AQI > 450): Ban on heavy vehicles, school closures, and shutdown of non-essential industries.
    • Purpose: To ensure a graded, coordinated, time-bound response that prevents air quality from escalating to hazardous levels.

    4)Air Quality Monitoring Measures:

    1) AQI (Air Quality Index)

    • Launched in 2014 with the concept “One Number – One Color – One Description” for easy public understanding.
    • Developed by the Central Pollution Control Board (CPCB).
    • Based on 8 pollutants: PM10, PM2.5, NO2, SO2, CO, O3, NH3, Pb.
    • Contains six air quality categories ranging from Good to Severe.

    2) SAFAR (System of Air Quality and Weather Forecasting and Research)

    • Provides location-specific, real-time air quality information for major Indian metropolitan cities.
    • Introduced by the Ministry of Earth Sciences, developed by IITM Pune.
    • Measures pollutants: PM2.5, PM10, O3, CO, NOx, SO2, Benzene, Toluene, Xylene, Mercury.
    • Uses Continuous Ambient Air Quality Monitoring Systems (CAAQMS); an example includes the one commissioned by the Indian Army in Kolkata.

    3) NAAQS (National Ambient Air Quality Standards)

    • Set by CPCB in 2009 under the Air (Prevention & Control of Pollution) Act, 1981.
    • Covers 12 pollutants, including SO2, NO2, PM10, PM2.5, O3, Pb, CO, NH3, Benzene, Benzopyrene, As, Ni.
    • Specifies annual and 24-hour standards for industrial, residential, rural, and ecologically sensitive areas.

    4) NAMP (National Air Quality Monitoring Programme)

    • Executed by CPCB to monitor ambient air quality across India.
    • Network includes 800+ stations in 344 cities/towns, covering 28 states and 6 UTs.
    • Objectives: track air quality trends, assess compliance with NAAQS, identify non-attainment cities.
    • Monitors SO2, NO2, PM10, and PM2.5 along with meteorological factors like wind speed, humidity, and temperature.

    5) WHO Ambient Air Quality Database

    • A global database compiling annual mean concentrations of PM2.5, PM10, and NO2.
    • First released in 2011; updated periodically—2023 is the sixth update.
    • Linked to WHO’s 2021 Global Air Quality Guidelines (AQGs), which tightened acceptable pollution limits.
    [UPSC 2022] In the context of WHO Air Quality Guidelines, consider the following statements:

    1. The 24-hour mean of PM 2.5 should not exceed 15 μg/m³ and annual mean of PM 2.5 should not exceed 5 μg/m³.

    2. In a year, the highest levels of ozone pollution occur during the periods of inclement weather.

    3. PM 10 can penetrate the lung barrier and enter the bloodstream.

    4. Excessive ozone in the air can trigger asthma.

    Which of the statements given above are correct?

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

  • [20th November 2025] The Hindu OpED: Hidden cost of polluted groundwater

    PYQ Relevance

    [UPSC 2024] The world is facing an acute shortage of clean and safe freshwater. What are the alternative technologies which can solve this crisis? Briefly discuss any three such technologies citing their key merits and demerits.

    Linkage: This PYQ is important for UPSC as freshwater scarcity and contamination are core GS-III themes. The article links directly by highlighting toxic groundwater, failing treatment systems, and the urgent need for affordable purification technologies.

    Mentor’s Comment

    Groundwater contamination in India is no longer a silent environmental issue, it has become an economic, social, and public-health emergency. This topic is highly relevant PYQ for UPSC, as water scarcity and groundwater contamination are recurring GS-III themes. The article directly aligns by showing how polluted aquifers and weak treatment systems make alternative purification technologies essential for India’s water security.

    Introduction

    Groundwater, the backbone of India’s drinking water and irrigation systems, is now increasingly polluted with heavy metals, industrial residues, and excess fertilizers. Reports from multiple states reveal a rise in fluoride, arsenic, uranium, and nitrate contamination, creating a public-health disaster and long-term economic losses. The issue has moved from isolated pockets to a nationwide development challenge demanding regulatory urgency, technological solutions, and sustainable water governance.

    Why in the News

    Recent rounds of India’s Groundwater Quality Report (2022) and field evidence from Punjab, Gujarat, Telangana, and Haryana indicate a sharp rise in toxic contamination, including fluoride-linked deformities, arsenic poisoning, and uranium beyond safe limits. The scale is unprecedented: nearly 600 million Indians rely on groundwater, and contamination is now accelerating due to over-extraction, fertilizer misuse, and industrial discharge. The crisis is no longer environmental, it is weakening agricultural incomes, burdening households with high medical costs, and threatening India’s export competitiveness.

    What Is Causing Groundwater to Become Toxic?

    1. Heavy Reliance on Groundwater
      • Over-extraction: Agriculture absorbs over 60% of India’s groundwater, exceeding sustainable limits in several districts.
      • Irrigation intensity: Canal systems have stagnated, forcing farmers to depend on tube wells.
      • Result: Declining water tables concentrate pollutants and accelerate toxicity.
    2. Chemical Contamination from Agriculture
      • Excess fertilizer and pesticide use: Leads to nitrate accumulation and leaching into aquifers.
      • Heavy metals: Arsenic, fluoride, uranium exceed permissible limits in many districts.
      • Impact: Childhood skeletal deformities, fluorosis, long-term organ damage.
    3. Industrial and Sewage Discharge
      • Untreated effluents: Lack of sewage treatment expands contamination beyond village boundaries.
      • Industrial residues: Agro-processing and manufacturing hubs increase heavy metal presence.
      • Outcome: Polluted aquifers affecting both rural and peri-urban areas.

    How Groundwater Pollution Impacts Health and Society

    1. Rising Health Burden
      • Skeletal deformities, fluorosis, kidney damage: Result of toxic metals in drinking water.
      • Children disproportionately affected: Early-life exposure lowers future productivity.
    2. Debt and Medical Expenditure
      • High out-of-pocket expense: Families spend heavily on hospital visits and bottled water.
      • Wealthier households cope better: Poorer families cannot afford alternative water sources.
    3. Intergenerational Impacts
      • Impaired cognitive development: Arsenic and fluoride exposure affects education outcomes.
      • Lower economic mobility: Chronic illness depresses earning capacity.

    How Groundwater Pollution Hurts Agriculture and the Economy

    1. Loss of Farm Productivity
      • Poor water quality reduces crop yields: Long-term exposure to contaminated irrigation water.
      • Heavy metals affect soil health: Reducing crop diversity and nutritional value.
    2. Threat to India’s Export Market
      • Buyers demand stringent quality checks: Contamination threatens rice, spices, fruits, vegetables.
      • The $50-60 billion agri-export sector risks losses due to toxicity and traceability issues.
    3. Vicious Cycle of Over-Extraction
      • Declining tables led to more drilling which leads to more contaminants: Increases farmer indebtedness.
      • High fertilizer use worsens soil chemistry: Further reduces sustainability.

    Why Policy Failure Allowed This Crisis to Escalate

    1. Weak Enforcement of Pollution Norms
      1. Inadequate regulation of industrial discharge: Leads to untreated sewage entering aquifers.
      2. Poor monitoring: Rural areas lack regular water quality surveillance.
    2. Lack of Decentralised Treatment Systems
      1. Dependence on centralized schemes: Community-level solutions not prioritized.
      2. Delayed response: Slow implementation of purification units.
    3. Limited Agricultural Diversification
      1. Punjab’s water-intensive cropping pattern: Maintains heavy groundwater stress.
      2. Minimal shift to millets/pulses despite policy incentives.

    Way Forward

    1. Nationwide Real-Time Groundwater Monitoring
      • Open access digital platform: Communities should know what they are drinking/using to irrigate.
      • Data-driven planning: Better targeting of polluted zones.
    2. Strengthen Industrial and Sewage Regulations
      • Strict enforcement of effluent norms: Prevent industrial leakages.
      • Expand sewage treatment infrastructure: Particularly in peri-urban zones.
    3. Agricultural Policy Reform
      • Shift away from water-intensive crops: Encourage pulses, maize, oilseeds.
      • Promote micro-irrigation: Reduce water table stress.
    4. Localised Water Purification
      • Community-level treatment plants: Immediate relief in severely contaminated areas.
      • Affordable household filtration for poor families.
    5. Long-Term Water Security Planning
      • Integrating health, agriculture, and environment: Holistic approach to water governance.
      • Prevent groundwater from becoming India’s next major economic crisis.

    Conclusion

    Groundwater contamination has transformed into a multidimensional crisis affecting public health, agriculture, exports, and intergenerational equity. Without strict regulation, real-time monitoring, and agricultural diversification, the economic and health losses will escalate. India must act decisively before the groundwater crisis becomes irreversible.

  • Asiatic Caracal spotted at Ramgarh in Rajasthan’s Jaisalmer

    Why in the News?

    The elusive Asiatic Caracal (Caracal caracal schmitzi) has been rediscovered at Ramgarh, Jaisalmer, reaffirming its survival in the Thar Desert after years of uncertainty.

    Asiatic Caracal spotted at Ramgarh in Rajasthan's Jaisalmer

    About Asiatic Caracal:

    • Scientific Name: Caracal caracal schmitzi, the Asiatic subspecies of the globally distributed caracal species.
    • Distribution: Native to Africa, Middle East, Central Asia, Pakistan, and historically across northwestern and central India, now restricted mainly to Rajasthan and Gujarat.
    • Indian Population: Fewer than 50 individuals survive in India, with small, fragmented groups in the Thar Desert, Ranthambhore landscape, and Kutch region.
    • Habitat: Prefers semi deserts, savannahs, scrublands, steppes, dry forests, and open arid terrains; uses grassland scrub mosaics for hunting and denning.
    • Ecology: A shy nocturnal mesopredator feeding on rodents, hares, birds, and occasionally small ungulates; known for vertical leaps up to 3 metres to strike flying prey.
    • Legal Protection: Listed in Schedule I of the Wildlife Protection Act 1972 and categorised as Least Concern globally but critically sparse within India.
    • Threats: Habitat loss from land conversion, solar parks, linear infrastructure, hunting, and misclassification of grasslands as wastelands reducing viable habitat.
    • Conservation Status in India: Included in the 2021 Species Recovery Plan by National Board for Wildlife (NBWL) and MoEFCC, with urgent need for grassland restoration, monitoring, and community based protection.
    [UPSC 2019] Question: Consider the following statements:

    1. Asiatic lion is naturally found In India only.

    2. Double-humped camel is naturally found in India only.

    3. One-horned rhinoceros is naturally found in India only.

    Which of the statements given above is / are correct?

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

     

  • [17th November 22] The Hindu Op-ed: Delhi’s air, a ‘wicked problem’ in need of bold solutions

    PYQ Relevance

    [UPSC 2021] Describe the key points of the revised Global Air Quality Guidelines (AQGs) recently released by the WHO. How are these different from its last update in 2005? What changes in India’s National Clean Air Programme are required to achieve these revised standards?

    Linkage: This PYQ directly links to Delhi’s recurring “severe” AQI episodes and the article’s emphasis on PM2.5 toxicity, life-expectancy loss, and structural regulatory failure. It is relevant because achieving WHO’s revised AQGs requires stronger, coordinated, long-term reforms, precisely what the article argues India’s NCAP currently lacks.

    Mentor’s Comment

    Delhi’s air crisis has again reached “public health emergency” levels, revealing the chronic and structural nature of India’s most persistent environmental challenge. This article breaks down Dr. Shashi Tharoor’s analysis of Delhi’s air pollution as a “wicked problem,” expands it with UPSC-relevant framing, and provides a structured, exam-oriented guide with value additions, PYQs, micro-themes, and practice questions.

    Introduction

    Delhi’s annual winter pollution has evolved from a seasonal inconvenience into a chronic public health emergency. Air Quality Index (AQI) levels routinely breach the 400+ “severe” category, shortening life expectancy by up to 10 years in highly exposed regions. The article argues that Delhi’s air crisis is a “wicked problem”, a complex mix of geographical, meteorological, and man-made factors requiring bold, holistic, and long-term solutions.

    Why in the News 

    Delhi’s air quality has once again plunged into the “severe” category post-Diwali, with AQI values exceeding 400 and triggering health alarms across NCR. What is striking is the persistence: for over a decade, seasonal pollution spikes have recurred despite policies, committees, bans, and monitoring systems. The article highlights the worsening public health impact, including a 10-year reduction in life expectancy, and shows that despite years of institutional attention, the crisis remains structurally unchanged, making this year’s episode another stark reminder of policy failure.

    Delhi’s Air Pollution as a Wicked Problem

    1. Complex Interactions: Combines geographical, meteorological, and human-made factors.
    2. Valley-like Topography: Delhi is landlocked with restricted air flow.
    3. Temperature Inversions: Trap pollutants close to the ground in winter.
    4. No Single Villain: Emissions arise from vehicles, industries, agriculture, construction, and households simultaneously.

    What Makes the Crisis Structurally Persistent?

    1. Chronic Health Emergency: PM2.5 toxicity linked to asthma, chronic obstructive pulmonary disease (COPD), strokes, cancers, anxiety, depression, and DNA damage.
    2. Reduced Life Expectancy: Exposure reduces life expectancy by up to 10 years in consistently high-PM areas.
    3. Population Movement: People relocate away from Delhi despite career opportunities due to health concerns.
    4. Elderly & Children at Risk: Respiratory illnesses sharply rise during winter.

    Why Are the Existing Measures Not Working?

    1. Weak Enforcement: BS-VI vehicles, dust-control norms, and industrial regulations remain poorly enforced.
    2. Rapid Urbanisation: Construction adds 27% of PM emissions; monitoring is patchy.
    3. Outdated Technology: Many industries in NCR still use old boilers and furnaces.
    4. Vehicular Emissions Rising: Over 3 crore vehicles in NCR; old diesel vehicles persist.

    Who Are the Major Contributors Highlighted in the Article?

    1. Stubble Burning: Seasonal crop residue burning in Punjab & Haryana adds massive smoke plumes.
    2. Firecrackers: Diwali and wedding fireworks spike PM levels.
    3. Waste Burning: Municipal waste, rubber, and plastic burning persists due to weak surveillance.
    4. Industries: Brick kilns, factories, and outdated machinery emit sulphur dioxide, nitrogen oxides, and PM.

    Structural Reforms Advocated to Address the Air Pollution Crisis

    1. System-wide Pollution Control Plan: Not piece-meal bans; requires unified regional strategy.
    2. Relocating Polluting Industries: Move red-category industries away from dense areas.
    3. Urban Design Changes: Create green lungs, redesign mobility, and improve public transport.
    4. Electric Mobility Transition: Incentivise EV adoption and shared mobility.
    5. Agricultural Alternatives: Support farmers with smoke-free residue management.
    6. Firecracker Alternatives: Scale up “green crackers”; enforce bans with political will.

    Conclusion

    Delhi’s air pollution demands collective regional action, technological upgrade, and political resolve. Seasonal, reactive measures have repeatedly failed; the crisis is structural and chronic. Treating it as a “wicked problem” requires system-wide transformation in transport, agriculture, industry, and governance, with long-term investment in cleaner technologies and behavioural change. The window for incrementalism has closed.

  • Researchers to study rare Dolphin-Fisher kinship in Ashtamudi Lake

    Why in the News?

    In Ashtamudi Lake, Kerala, artisanal fishers and Indo-Pacific humpback dolphins (Sousa plumbea) engage in a rare and sophisticated form of human–wildlife cooperative hunting.

    Researchers to study rare Dolphin-Fisher kinship in Ashtamudi Lake

    Unique Dolphin-Fisher in Ashtamudi Lake:

    • Cooperative Hunting: Dolphins herd fish towards artisanal fishers standing in shallow water.
    • Signals: Dolphins give tail-slaps or rolls to signal fishers to cast nets.
    • Mutual Benefit: Fishers get high catches; dolphins feed on escaping fish, forming a rare human–wildlife cooperation system.
    • Documentation: First studied by University of Kerala researchers; Similar systems studied in Brazil and Myanmar.
    • Expected Outcomes: Insights into animal culture, evolution of cooperation, and improved sustainable fishing practices.

    About Indo-Pacific Humpback Dolphins (Sousa plumbea):

    • Distribution: Found from East Africa to India, the Middle East and western Indochina, with major populations along India’s west coast.
    • Appearance: Identified by a large hump under the dorsal fin, dark grey plumbeous body, white mottling, and occasional pink shading; adults grow up to 2.8 m, newborns 97–108 cm.
    • Identification Traits: Long slender beak, dorsal fin perched on a mid-back hump, adults darken with age and often show shark-related scars.
    • Habitat: Prefer shallow waters (<20 m) within 1.5 km of shore; commonly near estuaries, river mouths, bays and nearshore fish concentrations.
    • Group Behaviour: Groups of 50–100 reported in India; shy but often seen during dolphin-watching trips.
    • Diet: Feed mainly on mullet, mackerel, sardines, pomfret and other schooling fish; sometimes exploit fishing nets, increasing entanglement risk.
    • Conservation Status: Vulnerable (IUCN), Appendix I (CITES), NOT LISTED under India’s Wildlife Protection Act (only Ganges and Snubfin dolphins are listed).
    • Colour Variation: Pinkish tint comes from superficial blood vessels used for thermoregulation; calves are dark grey.

    Researchers to study rare Dolphin-Fisher kinship in Ashtamudi Lake

    About Ashtamudi Lake:

    • Location: A brackish estuarine lake in Kerala covering 5,700 hectares; designated a Ramsar Site (2002).
    • Name Origin: “Ashtamudi” refers to its eight channels, forming a gateway to the Kerala backwaters.
    • Hydrology: Fed mainly by the Kallada River; empties into the Arabian Sea via Neendakara estuary.
    • History: Once the ancient port of Quilon mentioned by Ibn Battuta.
    • Flora: Mangroves include Avicennia officinalis, Bruguiera gymnorrhiza, Sonneratia caseolaris; region hosts rare plants like Syzygium travancoricum and Calamus rotang.
    • Fauna: Supports 57 bird species (6 migratory, 51 resident).
    • Sustainable Fishery: Home to India’s first MSC-certified clam fishery (2014).
    • Livelihood & Ecology: Vital for traditional fisheries, estuarine biodiversity, and local livelihood systems.
    [UPSC 2012] Which one of the following is not a lagoon?

    Options: (a) Ashtamudi lake (b) Chilka lake (c) Preiyar lake * (d) Pulicat lake