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Subject: Climate Change

1. Global Warming and Issues
2. All about Pollution

  • Salt Marsh Restoration on Oléron Island

    Why in News?

    The revival of the traditional salt harvesting profession on Oléron Island, France, is gaining attention as restored salt marshes help protect coastal areas from the increasing impacts of climate change, especially marine flooding.

    Key Highlights

    • The profession of salt worker disappeared from Oléron Island in the 1980s but has been revived with support from local authorities.
    • Salt marshes are being restored not only for salt production but also as a nature-based solution for climate adaptation.
    • These marshes act as buffer zones, reducing the impact of coastal flooding and storm surges.
    • Climate change has increased the frequency and intensity of marine flooding, making coastal ecosystem restoration increasingly important.

    What are Salt Marshes?

    • Salt marshes are coastal wetlands found in the intertidal zone between land and sea.
    • They are regularly flooded by seawater during high tides.
    • They are dominated by salt-tolerant (halophytic) vegetation such as grasses, sedges, and shrubs.
    • Salt marshes commonly occur in estuaries, lagoons, deltas, and sheltered coastlines.

    Ecological Importance

    • Act as natural buffers, reducing the impact of storm surges and coastal erosion.
    • Absorb and store excess floodwater, lowering flood risks.
    • Trap sediments and improve water quality.
    • Serve as breeding and nursery grounds for fish, crustaceans, and migratory birds.
    • Store large amounts of blue carbon, helping mitigate climate change.

    What is Blue Carbon?

    • Blue carbon refers to carbon captured and stored by coastal and marine ecosystems such as: Mangroves, Salt marshes, and Seagrass meadows
    • These ecosystems sequester carbon in both vegetation and underlying sediments for long periods.

    Threats to Salt Marshes

    • Coastal development and land reclamation.
    • Sea level rise due to climate change.
    • Pollution and eutrophication.
    • Conversion for agriculture and aquaculture.
    • Alteration of natural tidal flows.

    Relevance for India

    • India has significant coastal wetlands, including mangroves, salt marshes, mudflats, and seagrass meadows, which play a crucial role in coastal protection and climate resilience.
    • Restoration of these ecosystems supports India’s commitments under the Ramsar Convention, National Coastal Mission, and climate adaptation strategies.

    [2021] What is blue carbon?

    [A] Carbon captured by oceans and coastal ecosystems

    [B] Carbon sequestered in forest biomass and agricultural soils

    [C] Carbon contained in petroleum and natural gas

    [D] Carbon present in atmosphere

  • ‘Climate Change’ is a global problem. How India will be affected by climate change? How Himalayan and coastal states of India will be affected by climate change?

  • India Showcases Carbon Credit Trading Scheme at WTO

    Why in the news?

    India showcased its Carbon Credit Trading Scheme (CCTS) and renewable energy standards during the WTO Trade and Environment Week 2026 held in Geneva.

    Key Highlights

    • Event: WTO Trade and Environment Week 2026.
    • Theme of India’s session:
      • “Showcase of India’s Carbon Credit Trading Scheme and Standardization in Renewable Energy”.
    • Focus areas:
      • Sustainable development
      • Clean energy transition
      • Carbon markets
      • Renewable energy standards
      • Climate commitments under the Paris Agreement.

    India’s Climate Achievements

    Non-Fossil Fuel Capacity

    • Share of non-fossil fuel-based installed electricity capacity: 53.21% as of March 2026.
    • Target: 50% by 2030.
    • Achieved nearly five years ahead of schedule.

    Emissions Intensity

    • India reduced emissions intensity of GDP by: 37.38% between 2005 and 2022.
    • NDC target: 33–35% reduction by 2030.
    • Achieved ahead of timeline.

    Carbon Credit Trading Scheme (CCTS)

    • Objective: Develop a national carbon market in India.

    Features

    • National electronic carbon credit trading platform.
    • Uses market-based mechanisms to Reduce greenhouse gas emissions. Promote low-carbon technologies.

    Importance

    • Encourages industries to:
      • Improve energy efficiency.
      • Reduce carbon emissions.
      • Participate in carbon trading.

    Green Hydrogen Standards

    • Under National Green Hydrogen Mission
    • Focus: Emission thresholds and technical standards for classifying hydrogen as “Green Hydrogen”.
    • Purpose: Ensure Transparency, Credibility, Investor confidence, Development of green hydrogen ecosystem.

    India’s Climate Principles

    India highlighted: Equity, Common but Differentiated Responsibilities and Respective Capabilities (CBDR-RC), Multilateral cooperation.

    India-Japan Discussions at WTO

    • India and Japan discussed:
      • Transparency in climate-related trade measures.
      • Concerns regarding unilateral trade-restrictive environmental measures.
    • Focus: Avoiding unnecessary barriers to international trade.

    About WTO Trade and Environment Week

    • Organized under: World Trade Organization
    • Purpose: Discuss links between Trade, Climate change, Sustainability, and Environmental regulations.

    [2025] Consider the following statements:
    Statement I: Article 6 of the Paris Agreement on climate change is frequently discussed in global discussions on sustainable development and climate change.
    Statement II: Article 6 of the Paris Agreement on climate change sets out the principles of carbon markets.
    Statement III: Article 6 of the Paris Agreement on climate change intends to promote inter-country non-market strategies to reach their climate targets.
    Which one of the following is correct in respect of the above statements?

    [A] Both Statement II and Statement III are correct and both of them explain Statement I

    [B] Both Statement II and Statement III are correct but only one of them explains Statement I

    [C] Only one of the Statements II and III is correct and that explains Statement I

    [D] Neither Statement II nor Statement III is correct

  • India’s Biodiversity: Commitments and Achievements

    Why in News?

    The Government of India highlighted recent achievements and policy measures related to biodiversity conservation, governance, and sustainable use under the Convention on Biological Diversity (CBD).

    Biodiversity Governance Structure

    • India follows a three-tier biodiversity governance system:
      • National Biodiversity Authority at national level
      • State Biodiversity Boards (SBBs)
      • Biodiversity Management Committees (BMCs) at local level.
    • India has:
      • More than 2,76,653 Biodiversity Management Committees (BMCs)
      • Over 2,72,648 People’s Biodiversity Registers (PBRs).

    Note: Biodiversity Management Committees (BMCs) are local-level statutory bodies in India, mandated by the Biological Diversity Act of 2002.

    About Biodiversity

    • Biodiversity refers to the variety of life forms including:
      • Plants
      • Animals
      • Microorganisms
      • Ecosystems.

    Biological Diversity Act, 2002

    • India’s principal law for:
      • Biodiversity conservation
      • Sustainable use
      • Fair and equitable benefit sharing.

    Biological Diversity (Amendment) Act, 2023

    • Promotes:
      • Research and innovation
      • Traditional knowledge-based practices
      • Community participation.

    Important Concepts

    People’s Biodiversity Register (PBR)

    • Local biodiversity database prepared by BMCs.
    • Records:
      • Biological resources
      • Traditional knowledge
      • Local species and habitats.

    Access and Benefit Sharing (ABS)

    • Ensures benefits from biological resources are shared with local communities.

    Nagoya Protocol

    • Supplementary agreement under CBD adopted in Nagoya, Japan in 2010.
    • Focuses on fair sharing of benefits arising from genetic resources.

    Kunming-Montreal Global Biodiversity Framework (KMGBF)

    • Adopted during CBD COP-15 in Montreal in 2022.
    • Global target:
      • Halt and reverse biodiversity loss by 2030.

    National Biodiversity Strategy and Action Plan (NBSAP 2024-2030)

    • Aligns India’s biodiversity goals with KMGBF.
    • Promotes:
      • Whole-of-government
      • Whole-of-society approach.

    Key Achievements

    Forests and Protected Areas

    • Forest and tree cover: 8.27 lakh sq. km (25.17% of geographical area).
    • Protected areas: More than 1,134 protected areas covering 1.88 lakh sq. km.

    Species Conservation

    • Tiger population increased from: 2,226 (2014) to 3,682.

    Community Participation

    • National campaign underway for digitisation of PBRs into e-PBRs.

    ABS Achievements

    • ₹145 crore released to beneficiaries till May 2026.
    • Benefited around 11,000 BMCs (Biodiversity Management Committees).

    [2023] Consider the following statements:
    1. In Biodiversity the India, Management Committees are key to the realization of the objectives of the Nagoya Protocol.
    2. The Biodiversity Management Committees have important functions in determining access and benefit sharing, including the power to levy collection fees on the access of biological resources within its jurisdiction.
    Which of the statements given above is/are correct?

    [A] 1 only

    [B] 2 only

    [C] Both 1 and 2

    [D] Neither 1 nor 2

  • India’s Green Transformation

    Why in the news?

    The Government of India highlighted major achievements in environmental protection, biodiversity conservation, climate action, and sustainable development over the last 12 years.

    Forest and Green Cover

    • India’s forest and tree cover reached 8.27 lakh sq. km (25.17% of geographical area).
    • Forest carbon stock stands at 30.43 billion tonnes.
    • Compensatory Afforestation Fund Management and Planning Authority undertook over 3.2 lakh hectares of compensatory afforestation between FY 2020-21 and 2024-25.
    • “Ek Ped Maa Ke Naam” campaign planted 262.4 crore saplings till December 2025.

    River Rejuvenation

    • Namami Gange Programme launched for restoration of the River Ganga.
    • 524 projects worth ₹43,030 crore sanctioned till February 2026.
    • Industrial BOD load reduced from 26 TPD (2017) to 10.75 TPD (2024).
    • Gangetic dolphin population estimated at 6,327.

    Wetland Conservation

    • Wetland conservation strengthened under the National Plan for Conservation of Aquatic Ecosystems (NPCA).
    • India’s Ramsar sites increased from 26 in 2014 to 99 by April 2026.

    Mangrove and Coastal Ecosystems

    • Mangrove cover increased from 4,628 sq. km (2013) to 4,992 sq. km (2023).
    • Blue Flag certified beaches increased to 18 in 2025-26.

    Wildlife Conservation

    • Project Tiger: Tiger population increased from 2,226 (2014) to 3,682 (2022).
    • Project Cheetah: India’s cheetah population reached 53.
    • Asiatic lion population increased to 891 in 2025.
    • India hosts nearly 60% of the global wild Asian elephant population.

    Waste Management and Circular Economy

    • Solid waste processing increased from 17% (2014) to over 77% (2024).
    • 1,138 dumpsites remediated across 1,048 cities.
    • Extended Producer Responsibility (EPR) frameworks expanded for plastics, batteries, tyres, e-waste, and used oil.

    Climate and Global Leadership

    • India achieved its target of reducing emissions intensity by 33-35% from 2005 levels ahead of schedule.
    • Non-fossil sources account for 52.57% of installed power capacity (February 2026).
    • Major global initiatives led by India:
      • International Solar Alliance
      • Coalition for Disaster Resilient Infrastructure
      • International Big Cat Alliance
      • Mission LiFE

    [2025] Consider the following statements:
    Statement I: Circular economy reduces the emissions of greenhouse gases.
    Statement II: Circular economy reduces the use of raw materials as inputs.
    Statement III : Circular economy reduces wastage in the production process.
    Which one of the following is correct in respect of the above statements?

    [A] Both Statement II and Statement III are correct and both of them explain Statement I

    [B] Both Statement II and Statement III are correct but only one of them explains Statement I

    [C] Only one of the Statements II and III is correct and that explains Statement I

    [D] Neither Statement II nor Statement III is correct

  • Consider the following which can be found in the ambient atmosphere

    Consider the following which can be found in the ambient atmosphere:
    1. Soot
    2. Sulphur hexafluoride
    3. Water vapour
    Which of the above contribute to the warming up of the atmosphere?

  • Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because

    Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because
    1. its escape into the outer stratosphere
    2. the photosynthesis by phytoplankton in the oceans
    3. the trapping of air in the polar ice caps.
    Which of the statements given above is/are correct?

  • The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs

    The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs

  • Which of the following can be threats to the biodiversity of a geographical area

    Which of the following can be threats to the biodiversity of a geographical area?
    1. Global warming
    2. Fragmentation of habitat
    3. Invasion of alien species
    4. Promotion of vegetarianism
    Choose the correct answer using the code given below:

  • The scientific view is that the increase in global temperature should not exceed 2 0 C above pre-industrial level. If the global temperature increases beyond 30 C above the pre-industrial level, what can be its possible impact/impacts on the world

    The scientific view is that the increase in global temperature should not exceed 2 0 C above pre-industrial level. If the global temperature increases beyond 30 C above the pre-industrial level, what can be its possible impact/impacts on the world?
    1. Terrestrial biosphere tends toward a net carbon source.
    2. Widespread coral mortality will occur.
    3. All the global wetlands will permanently disappear.
    4. Cultivation of cereals will not be possible anywhere in the world.
    Select the correct answer using the code given below: