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GS Paper: GS3-18.Conservation, Environmental Pollution and Degradation, Environmental Impact Assessment.

  • MoEFCC approves Reconstruction of Teesta Dam despite Safety Concerns

    Why in the News?

    The Union Ministry of Environment, Forest and Climate Change (MoEF&CC) has approved the reconstruction of the Teesta-III Dam, which was destroyed by a Glacial Lake Outburst Flood (GLOF) in October 2023.

    About Teesta River

    • The Teesta River is a transboundary river flowing through India and Bangladesh.
    • Originates from Tso Lhamo Lake, Sikkim, at 5,330 meters in the Himalayas.
    • Major tributary of the Brahmaputra River (Jamuna in Bangladesh).
    • Vital for irrigation, hydroelectric power, and water supply in Sikkim, West Bengal, and Bangladesh.
    • The Teesta Water Dispute remains unresolved, with Bangladesh seeking an equitable share of water.

    Geographical Features:

    • Length: 414 km (309 km in India, 105 km in Bangladesh).
    • Basin Area: 12,159 sq. km in Sikkim and North Bengal.
    • Originates in North Sikkim → flows through West Bengal → enters Bangladesh before merging with the Brahmaputra River.
    • Passes through major towns like Mangan, Kalimpong, Jalpaiguri, and Rangpo.
    • Tributaries:
      • Left-bank: Rangit, Relli, Great Rangit.
      • Right-bank: Lachung, Lachen, Talung.
    • It supports Himalayan biodiversity, crucial for tea plantations and terrace farming.

    Conservation Initiatives:

    • National River Conservation Plan (NRCP): Includes efforts to reduce pollution and improve water quality of the Teesta.
    • Teesta Barrage Project (West Bengal): Aimed at irrigation development and hydroelectric power generation in North Bengal.
    • Hydroelectric Projects in Sikkim: Several Teesta Hydropower Projects (Teesta Stage III, IV, V, VI, etc.) have been established to generate renewable energy while ensuring minimum ecological impact.
    • India-Bangladesh Water Sharing Talks: Ongoing diplomatic negotiations to resolve the Teesta water-sharing dispute, ensuring equitable distribution.
    • Catchment Area Treatment (CAT) Plan: Implemented to prevent soil erosion and siltation, protecting river health.
    PYQ:

    [2017] With reference to river Teesta, consider the following statements:

    1. The source of river Teesta is the same as that of Brahmaputra but it flows through Sikkim.

    2. River Rangeet originates in Sikkim and it is a tributary of river Teesta.

    3. River Teesta falls into Bay of Bengal at the border of India and Bangladesh.

    Which of the statements given above is/are correct?

    (a) 1 and 3 only

    (b) 2 only

    (c) 2 and 3 only

    (d) 1, 2 and 3

  • Why Greenland’s crystal blue lakes have turned brown?

    Why in the News?

    A new study has revealed that over 7,500 lakes in western Greenland have turned brown, suffered water quality deterioration, and started emitting carbon due to extreme weather events in 2022.

    About Greenland and Its Lakes

    • Greenland, the world’s largest island, is covered by a massive ice sheet that holds nearly 8% of the world’s freshwater.
    • The island is home to thousands of glacial-fed lakes, which are crystal blue due to their pristine water quality and low organic content.
    • These lakes play a crucial role in providing drinking water, supporting biodiversity, and storing atmospheric carbon by acting as natural carbon sinks.

    What are the reasons?

    • Extreme Weather in 2022: Greenland saw record-breaking heatwaves and heavy rainfall instead of the usual snowfall.
    • Permafrost Thawing: Rising temperatures melted permafrost, releasing large amounts of organic carbon, iron, and other minerals into the lakes.
    • Atmospheric Rivers: These long, narrow streams of water vapor in the sky caused intense precipitation, leading to large-scale runoff of organic material and sediments into the lakes.
    • Loss of Light Penetration: Increased sedimentation turned the lakes murky brown, reducing sunlight penetration and affecting phytoplankton, which play a key role in carbon absorption.

    Why this Study is important?

    • The study found that changes in the lakes occurred within months instead of centuries, signaling an unprecedented climate impact.
    • Once natural carbon absorbers, the lakes are now releasing 350% more carbon dioxide, accelerating global warming.
    • The lakes, which supply drinking water, now contain higher levels of organic pollutants, affecting both humans and aquatic ecosystems.
    • Studies suggest atmospheric rivers will become 50–290% more frequent by the end of the century, leading to widespread changes in other freshwater ecosystems worldwide.
    • The study adds to growing evidence that Earth’s natural carbon sinks are failing, posing a major challenge to climate mitigation efforts.

    PYQ:

    [2011] The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?

    (a) Ice is a bad conductor of heat

    (b) Since the surface of the lake is at the same temperature as the air, no heat is lost

    (c) The density of water is maximum at 4 °C

    (d) None of the statements A, B and C given above is correct.

  • The Union Budget as a turning point for climate action

    Why in the News?

    Everyone will be watching Finance Minister Nirmala Sitharaman on February 1 as she presents the FY26 Budget, which needs to focus on climate issues and help India reach its Net-Zero goal by 2030.

    How will the proposed climate finance taxonomy influence investment in sustainable projects?

    • Standardization and Clarity: The proposed climate finance taxonomy will standardize definitions of green finance, providing clarity and reducing ambiguity for investors. This will help in distinguishing genuinely sustainable projects from those that are not, thereby building investor confidence.
    A green finance taxonomy is a classification system that defines which activities, investments, or projects are considered “green” or environmentally sustainable.
    • Increased Investment: By standardizing green finance definitions, the taxonomy can attract a significant portion of the ₹162.5 trillion ($2.5 trillion) needed to achieve India’s Nationally Determined Contributions (NDCs) by 2030. This is crucial for scaling up investments in sustainable projects.
    • Market Readiness: The taxonomy will necessitate the development of institutional and technical infrastructure, including market readiness programs, verification systems, and capacity building of financial institutions. This will create a robust ecosystem for green investments.
    • Differential Tax Treatment: The Budget could introduce differential tax treatment for investments aligned with the taxonomy, making green investments more attractive compared to conventional ones.

    What specific measures are needed to incentivize green investments in the upcoming budget?

    • Expanding PLI Schemes for Solar Module Supply Chain: India’s domestic solar module manufacturing capacity stands at 18-20 GW, while the annual demand is 30-35 GW. Imported solar panels are 65% cheaper than domestically produced ones.
      • So, need to expand the scope of PLI schemes can enhance domestic capacity and reduce dependency on imports.
    • Public-Private Partnerships for Railway Renewable Energy: Indian Railways has 51,000 hectares of land available for renewable energy projects, yet only 142 MW of solar capacity has been installed so far, against a potential of 5 GW. Public-private partnerships can unlock this potential and align with the Railways’ decarbonization goals.
    • Establishing a Climate Action Fund for CBAM Compliance: India’s exports of CBAM-covered products to the EU amount to $8.22 billion annually. MSMEs, which contribute 30% of GDP and 45% of exports, often lack resources for decarbonization. A dedicated Climate Action Fund could support MSMEs in meeting compliance requirements and maintaining competitiveness.
    • Fiscal Allocations for the RESCO Model: Only 6.34 lakh (4.37%) of 1.45 crore registrations under the PM Surya Ghar Muft Bijlee Yojana have been completed. Additionally, 60% of Indian households find rooftop solar installations unaffordable due to upfront costs.
      • The RESCO model can help by enabling financing solutions to bridge this affordability gap.
    • Tax Deductions and Depreciation Benefits for Circular Economy: India generates 62 million tonnes of waste annually, with only 30% being recycled. Transitioning to a circular economy could contribute ₹40 lakh crore ($624 billion) annually by 2050.
      • Tax incentives and accelerated depreciation benefits can encourage private sector participation in recycling and resource efficiency.

    What are the steps taken by the Government of India? 

    • National Action Plan on Climate Change (NAPCC): Launched in 2008, this comprehensive framework includes eight missions aimed at addressing climate change through renewable energy promotion, enhanced energy efficiency, sustainable habitat development, and more.
      • Key missions include the National Solar Mission and the Green India Mission, which focus on increasing solar energy usage and enhancing forest cover, respectively.
    • Commitment to Renewable Energy: India aims to achieve 500 GW of non-fossil fuel energy capacity by 2030 and has pledged to reduce total projected carbon emissions by one billion tonnes.
    • Adaptation and Resilience Initiatives: The government has established the National Adaptation Fund on Climate Change (NAFCC) to support projects that enhance resilience against climate impacts.
      • On the other hand, the State Action Plan on Climate Change (SAPCC) aligns with NAPCC objectives, focusing on sector-specific adaptations in agriculture, water management, and biodiversity.

    How can India ensure accountability and transparency in its climate financing efforts? (Way forward)

    • Sovereign Green Bond Framework: Establish a sovereign green bond framework specifically for financing circular economy infrastructure, ensuring that funds are allocated transparently and used for their intended purposes.
    • Verification Systems: Implement robust verification systems to ensure that projects funded through green finance taxonomy are genuinely sustainable and meet the required environmental standards.
    • Capacity Building: Invest in capacity building of financial institutions to effectively implement the climate finance taxonomy, including training programs and technical support.
    • Government Expenditure Classification: Commit to classifying government expenditure according to green criteria, ensuring that public funds are directed towards sustainable projects.
    • Regular Reporting and Audits: Mandate regular reporting and audits of climate-related expenditures and projects to ensure accountability and transparency. This will help in tracking progress and making necessary adjustments to policies and allocations.

    Mains PYQ:

    Q  ‘Clean energy is the order of the day.’ Describe briefly India’s changing policy towards climate change in various international fora in the context of geopolitics. (UPSC IAS/2022)

  • Indore and Udaipur earn global recognition for ‘Wetland Conservation’ Efforts

    Why in the News?

    Prime Minister recently commended Indore and Udaipur for earning a spot in the prestigious list of 31 Wetland Accredited Cities (WCA) worldwide under the Ramsar Convention on Wetlands.

    Key Highlights of Indore and Udaipur

    • Indore:
      • Known as India’s cleanest city and recipient of Smart City 2023 Award.
      • Sirpur Lake, a Ramsar site, supports large water bird congregations and is being developed as a bird sanctuary.
      • Over 200 wetland mitras are actively involved in conservation efforts, particularly protecting the Sarus Crane.
    • Udaipur:
      • Famous for its picturesque lakes, including Pichola, Fateh Sagar, Rang Sagar, Swaroop Sagar, and Doodh Talai.
      • These wetlands are vital for maintaining the city’s microclimate and providing a buffer against extreme weather events.

    About Wetland City Accreditation (WCA)

    • It was introduced during COP 12 (2015) of the Ramsar Convention to recognize cities that take exceptional steps in wetland conservation and sustainable management.
    • Objective: To promote the conservation and wise use of urban and peri-urban wetlands while fostering socio-economic benefits for local populations.
    • The accreditation is valid for 6 years.

    Criteria for WCA:

    Cities must meet specific standards set by the Ramsar Convention, including:

    • Presence of one or more Ramsar sites or significant wetlands.
    • Implementation of wetland conservation measures and restoration initiatives.
    • Integration of wetlands into land-use planning.
    • Raising public awareness about the importance of wetlands.
    • Establishing local committees with expertise in wetland management.
    • Having strong laws and policies to prevent wetland degradation.

    India’s Efforts in Wetland Conservation

    • India became a Ramsar Convention member in 1982, with 85 Ramsar sites covering 13,58,068 hectares (10% of India’s wetland area).
    • India initially designated 26 Ramsar sites (1982–2013) and added 59 more since 2014, reflecting a growing commitment to wetland preservation.
    • Tamil Nadu leads with 18 Ramsar sites, followed by Uttar Pradesh (10 sites).
    • Global Leadership Wetland Conservation:
      • UK has the highest number of Ramsar sites (175), followed by Mexico (142).
      • Bolivia has the largest area under Ramsar protection (148,000 sq. km).

    Interesting Facts about Indian Wetlands:

    • India’s wetlands cover 1,52,600 sq. km, constituting 4.63% of its geographical area (ISRO data).
    • Gujarat has the largest wetland area, followed by Andhra Pradesh, Uttar Pradesh, and West Bengal.
    • Ramsar Wetlands of International Importance:
      • Examples include Chilika Lake (Odisha), Sundarbans (West Bengal), and Keoladeo National Park (Rajasthan).

     

    PYQ:

    [2014] If a wetland of international importance is brought under the ‘Montreux Record’, what does it imply?

    (a) Changes in ecological character have occurred, are occurring or are likely to occur in the wetland as a result of human interference.
    (b) The country in which the wetland is located should enact a law to prohibit any human activity within five kilometres from the edge of the wetland.
    (c) The survival of the wetland depends on the cultural practices and traditions of certain communities living in its vicinity and therefore the cultural diversity therein should not be destroyed.
    (d) It is given the status of ‘World Heritage Site.’

  • Nahargarh Wildlife Sanctuary

    Why in the News?

    The Forest Department of Rajasthan has initiated efforts to revise the boundaries of the Nahargarh Wildlife Sanctuary to address existing legal and administrative complications.

    Nahargarh Wildlife Sanctuary

    About the Nahargarh Wildlife Sanctuary

    • It was established in 1980, Nahargarh Wildlife Sanctuary is located in Jaipur, Rajasthan.
    • It is named after the nearby Nahargarh Fort, which overlooks the sanctuary.
    • It is a significant part of the Ranthambore Tiger Reserve corridor, providing a habitat for wildlife movement.
    • Geographical Features:
      • It is situated in the Aravalli hills, close to Jaipur city, offering a natural escape amidst urban surroundings.
      • Its area spans approximately 50 square kilometres, featuring rugged terrain with hills, valleys, and plateaus.
      • It has seasonal streams and waterholes that serve as vital water sources for wildlife.
    • Flora and Fauna:
      • Flora: Comprises dry deciduous and thorny scrub forests, typical of the Aravalli range; Key tree species include Dhok, Babool, Khejri, and Ber; Grassy patches and scattered shrubs provide a diverse ecosystem for herbivores.
      • Fauna: Fauna: Includes leopards, hyenas, wild boars, jackals, sambars, chitals, peacocks, partridges, migratory birds, monitor lizards, snakes, turtles, and various pollinators.

    PYQ:

    [2012] In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?

    (a) Biosphere Reserves

    (b) National Parks

    (c) Wetlands declared under Ramsar Convention

    (d) Wildlife Sanctuaries

  • In news: Vaigai River

    Why in the News?

    The Madras High Court has issued directives to local bodies in Madurai, Theni, Dindigul, Sivaganga, and Ramanathapuram districts to submit a comprehensive action plan with timelines to mitigate pollution in the Vaigai River.

    About Vaigai River

    Geographical Features and Location
    • Originates from the Varusanadu Hills in the Western Ghats, Tamil Nadu.
    • Flows through Madurai, Theni, Dindigul, Sivaganga, and Ramanathapuram districts.
    • Length: Approximately 258 km, draining into the Palk Strait.
    • Major towns along the river include Madurai.
    • Historical site Keeladi is also located along the river.
    Major and Minor Tributaries
    • Major Tributaries: Suruliyar River, Varaha River, Manjalar River, Kottagudi River, and Kridhumaal River.
    • Minor Tributaries: Sambanadi River, Kumilaar River, and Utharakosa Mangaiyar River.
    Conservation Sites and Programs
    • Srivilliputhur Megamalai Tiger Reserve: Acts as a vital catchment area and supports biodiversity.
    • Vaigai Dam: Built near Andipatti, providing irrigation and drinking water.
    • Vaigai River Restoration Program: Focuses on cleaning, improving water quality, and promoting biodiversity.

    In news: Vaigai River

    PYQ:

    [2021] Which one of the following statements is correct?​

    (a) Ajanta Caves lie in the gorge of Waghora river.​

    (b) Sanchi Stupa lies in the gorge of Chambal river.​

    (c) Pandu-lena Cave Shrines lie in the gorge of Narmada river.​

    (d) Amaravati Stupa lies in the gorge of Godavari river.​

  • What is Keeling Curve?

    Why in the News?

    Atmospheric CO₂ levels hit a record high in 2024 due to wildfires and human activities, as shown by the Keeling Curve, a 67-year record maintained at Mauna Loa Observatory since 1958.

    What is Keeling Curve?

    What is Keeling Curve?

    • The Keeling Curve is a long-term record of atmospheric CO₂ concentrations, initiated by Charles David Keeling in 1958 at the Mauna Loa Observatory, Hawaii.
    • It tracks the rise in CO₂ levels and provides evidence of the impact of human activities on climate change.
    • Named after Charles David Keeling, it has become a globally recognized tool for understanding global warming.

    Significant Features and Sources:

    • Steady Upward Trend: Demonstrates a consistent rise in atmospheric CO₂ levels since 1958, primarily due to fossil fuel combustion and deforestation.
    • Seasonal Fluctuations:
      • CO₂ levels decrease during spring and summer as plants absorb CO₂ through photosynthesis.
      • Levels increase during fall and winter when plant decay releases CO₂.
    • Initial Measurements: Recorded CO₂ levels at 315 ppm in 1958.
    • Current Levels: As of January 2025, CO₂ concentrations have reached 427.1 ppm, the highest in millions of years.
    • Data Sources: Measurements are taken from Mauna Loa Observatory and other global monitoring stations.

    Observations around the Curve

    • Key Milestones:
      • 1988: CO₂ levels reached 350 ppm, drawing global attention to climate change.
      • 2023: Levels exceeded 420 ppm, marking a critical point in atmospheric history.
      • 2024: Record growth of 3.58 ppm in average annual CO₂ concentrations compared to 2023.
    • Contributing Factors:
      • El Niño: Surface temperature rise in the Pacific Ocean boosted CO₂ emissions during 2024, exacerbated by wildfires in North and South America.
      • Anthropogenic Emissions: Burning fossil fuels and land-use changes remain major contributors.
    • Global Implications:
      • Contradicts IPCC scenarios for limiting global warming to 1.5°C, as emissions continue to rise.
      • Record increases in CO₂ levels during El Niño events highlight the interplay between natural phenomena and human activities.

    PYQ:

    [2011] Consider the following:

    1. Photosynthesis

    2. Respiration

    3. Decay of organic matter

    4. Volcanic action

    Which of the above add carbon dioxide to the carbon cycle on Earth?

    (a) 1 and 4 only

    (b) 2 and 3 only

    (c) 2, 3 and 4 only

    (d) 1, 2, 3 and 4

  • In news: Chincholi Wildlife Sanctuary

    Why in the News?

    The Kalaburagi Forest Division is working to relocate a hamlet within the Chincholi Wildlife Sanctuary on the Karnataka-Telangana border to a safer area.

    About the Chincholi Wildlife Sanctuary

    Details
    • Declared a wildlife sanctuary in 2011, covering 134.88 sq. km.
    • Recognized as the first dryland Wildlife Sanctuary in South India.
    • Located in the Kalaburagi District, renowned for its floristic diversity.
    • Contributes to the conservation of dryland ecosystems.
    Geographical Location
    • Situated in the Hyderabad Karnataka region.
    • Features the Chandrampalli Dam and four smaller dams within the sanctuary.
    Flora and Fauna
    • Flora: Rich in medicinal plants and tree species like Red Sanders, Sandalwood, Acacia, and Teak.
    • Fauna:
      • Mammals: Blackbuck, Common Fox, Four-horned Antelope, Indian Wolf, Hyena, and Fruit Bat.
      • Birds: Over 35 species, including Black Drongo, Black-winged Kite, Blossom-headed Parakeet, Blue Pigeon, Black-headed Oriole, and Grey Partridge.
    Climatic/Geographical Features
    • Comprises dry deciduous and moist deciduous forests.
    • Fringes are planted with Acacia and Teak.
    • Supports a dryland ecosystem with water bodies like the Chandrampalli Dam.
    • Features a mix of arid and semi-moist climatic conditions.

     

    PYQ:

    [2018] In which one of the following States is Pakhui Wildlife Sanctuary located?

    (a) Arunachal Pradesh

    (b) Manipur

    (c) Meghalaya

    (d) Nagaland

  • Species in news: Indian Bison (Gaur)

    Why in the News?

    The Jharkhand Forest department has initiated a study to revive the dwindling population of Bison, popularly known as Gaur, at Palamu Tiger Reserve (PTR).

    bison

    About Indian Bison (Gaur)

    Details
    • Largest and tallest species in the wild cattle family.
    • Scientific Name: Bos gaurus.
    • Indigenous to South and Southeast Asia.
    Species Habitat and Location
    • Found in evergreen, semi-evergreen, and moist deciduous forests with open grasslands.
    • Prefers hilly terrains below 1,500–1,800 m with abundant water.
    • Distributed across India, Nepal, Bhutan, Myanmar, and Thailand.
    Behavioural Features
    • Social animals living in herds of 30–40 individuals.
    • Strong and sturdy limbs, short tails, and inward-curved pale green/yellowish-brown horns.
    • Males weigh 600–1,500 kg; females weigh 400–1,000 kg.
    • Convex-shaped forehead; height ranges from 170–230 cm.
    Conservation Status
    • IUCN Red List: Vulnerable.
    • Wildlife Protection Act, 1972: Schedule I.
    • CITES: Appendix I.

     

    PYQ:

    [2011] A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal?

    (a) Indian wild buffalo

    (b) Indian wild ass

    (c) Indian wild boar

    (d) Indian gazelle.

  • Survey adds 24 new species to Munnar’s faunal stock

    Survey adds 24 new species to Munnar’s faunal stock

    Why in the News?

    A recent faunal survey conducted in the Munnar Wildlife Division has documented 24 new species of birds, butterflies, and odonates, enriching its biodiversity checklist.

    Which are the surveyed sites?

    All the surveyed national parks and wildlife sanctuaries are located in Kerala, India, specifically in the Idukki district:

    • Mathikettan Shola National Park (MSNP): It is a biodiversity hotspot and part of the Western Ghats.
    • Pambadum Shola National Park (PSNP): It is Kerala’s smallest national park and home to unique flora and fauna.
    • Anamudi Shola National Park (ANP): Named after Anamudi, the highest peak in South India.
    • Kurinjimala Wildlife Sanctuary (KWLS): Located in Idukki, it protects the habitat of the Neelakurinji (Strobilanthes kunthiana), a flower that blooms once every 12 years.
    • Eravikulam National Park (ENP): Famous for the Nilgiri Tahr.
    • Chinnar Wildlife Sanctuary (CWLS): Situated in the rain-shadow region of the Western Ghats, near the Kerala-Tamil Nadu border in Idukki.

    Key Highlights of the Survey

    • New Species Added: 24 new species, including birds (11), butterflies (8), and odonates (5).
    • Total Documentation:
      • Birds: 217 species recorded; checklist updated to 258.
      • Butterflies: 166 species recorded; checklist updated to 246.
      • Odonates: 5 new records, checklist updated to 58 species.
    • Notable Wildlife Observed: Mammals like Nilgiri Tahr, tigers, leopards, and elephants; 12 species of reptiles and amphibians.

    About the Added Species

    • Birds:
      • New Additions: Brown Hawk Owl, Barred Buttonquail, Spotted Owlet, Mottled Wood Owl, Baya Weaver, Red Munia, Richard’s Pipit, Jerdon’s Bushlark, Golden-Headed Cisticola, Large Grey Babbler, Chestnut-Bellied Nuthatch.
      • Highlights: Nilgiri Wood Pigeon, Steppe Eagle, Peregrine Falcon, Indian Grey Hornbill, and Blue-eared Kingfisher.
    • Butterflies:
      • Endemic Species: Red-disc Bushbrown, Palni Fritillary, Nilgiri Tiger, Nilgiri Four-ring.
      • Unique Sightings: Grass Jewel (smallest butterfly in Kerala), Southern Birdwing (largest butterfly in India).
    • Odonates (flying insects):
      • New Records: Cratilla lineata calverti, Macrodiplax cora, Palpopleura sexmaculata, Tholymis tillarga, Lestes elatus.

    PYQ:

    [2020] With reference to India’s biodiversity Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart are:

    (a) Birds

    (b) Primates

    (c) Reptiles

    (d) Amphibans