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Subject: Climate Change

1. Global Warming and Issues
2. All about Pollution

  • How does plastic pollution affect health?

    Introduction

    Plastic pollution represents one of the gravest environmental crises of our times. Despite decades of regulation and bans, plastics remain ubiquitous, cheap, and nearly indestructible. Talks in Geneva involving 180 countries failed to secure an internationally binding legal agreement to limit plastic pollution, reflecting deep divisions over whether the treaty should target waste alone or include production.

    Global Plastic Treaty Deadlock: Why It Matters

    • Global deadlock: 180 countries failed to agree on a binding treaty on plastic pollution in Geneva, despite a UNEP-backed resolution already in place.
    • First-time sharp focus on health: Unlike earlier discussions centred only on waste management, the health impact of plastics is now central.
    • Scale of problem: Plastics contain more than 16,000 chemicals, with little knowledge on 10,000+ of them. A Nature study showed 4,000 chemicals of concern are present across major plastic types.
    • Striking evidence: Microplastics detected in blood, breast milk, placenta, bone marrow, bringing urgency to the debate.

    The Persistence and Ubiquity of Plastics

    1. Symbol of consumption economy: Cheap and versatile, plastics reflect today’s global consumption.
    2. Persistence and flexibility: Synthetic, fossil-fuel-derived polymers are non-biodegradable and endure for decades.
    3. Waste mismanagement: Cheap production, ubiquity, and limited recycling capacity turn plastics into the prime source of litter.

    Plastics and Human Health: Emerging Evidence

    1. Chemicals of concern: Plastics use ethylene, propylene, styrene derivatives, along with bisphenols, phthalates, PCBs, PBDEs, and PFAS.
    2. Products of exposure: Found in food containers, bottles, teething toys, polyester, IV bags, cosmetics, paints, electronics, adhesives.
    3. Health links: Studies link plastic chemicals to thyroid dysfunction, hypertension, kidney/testicular cancer, gestational diabetes.
    4. Evidence base: Around 1,100 studies, involving 1.1 million individuals, compiled by Boston College & Minderoo Foundation dashboard.
    5. Nature of studies: Mostly associative; longitudinal studies (gold standard) are still underway.

    The Microplastic Menace

    1. Definition: Plastics smaller than 5 mm, found in additives or broken-down products.
    2. Recent discoveries: Detected in human blood, breast milk, placenta, bone marrow.
    3. Health uncertainty: Exact impacts still under study, but linked to multiple disorders.

    Policy Responses: Global and Indian Perspectives

    • Global scene: Negotiations divided on waste vs production; developing countries demand funding support.
    • India’s stance: 
      • Ban on single-use plastics in ~20 States
      • Administrative push for Extended Producer Responsibility (EPR)
      • Views plastics as a waste management issue, not a health issue.
      • Prefers health dimension to be dealt with at WHO, not in the plastics treaty.

    Conclusion

    The Geneva deadlock reflects not just a failure of diplomacy but the widening gap between scientific evidence and policy action. Plastics are no longer an invisible convenience; they are a pervasive health hazard. While India treats plastics as a waste issue, ignoring health risks leaves a blind spot in policy. A robust, binding treaty addressing both production and health impact is indispensable if the world is to prevent plastics from becoming the new tobacco of the 21st century.

    PYQ Relavance

    [UPSC 2023] What is oil pollution? What are its impacts on the marine ecosystem? In what way is oil pollution particularly harmful for a country like India?

    Linkage: Since UPSC has already asked about oil pollution (2023), it shows the exam’s focus on pollution and ecosystem impacts. Plastic pollution, like oil, originates from fossil fuels and has severe effects on marine life and human health. Hence, a direct question on plastic pollution and its health–environment nexus is highly probable.

    Practice Mains Question

    Plastics are no longer merely a waste management problem but a serious health hazard. Critically examine the health risks associated with plastic use and evaluate India’s stance in global plastic treaty negotiations.

    Mapping Microthemes

    • GS-1: Impact of industrialisation and consumerism on environment.
    • GS-2: International negotiations, India’s foreign policy stance in environmental treaties.
    • GS-3: Pollution, waste management, health-environment nexus.
    • GS-4: Ethics of sustainability, intergenerational justice, corporate responsibility.
  • Why the ICJ’s advisory opinion on climate change opens the window for a new, restorative vision of environmental law in India

    Why in the News?

    Recently, the International Court of Justice (ICJ) delivered a landmark advisory opinion on July 23, 2025, clarifying the legal obligations of states regarding climate change.

    Note: The International Court of Justice (ICJ) is the principal judicial organ of the United Nations. While advisory opinions are not formally binding, they hold persuasive (Convince other) legal weight and reflect the Court’s authoritative interpretation of international law.

    What does the ICJ say about saving nature and the climate?

    • Nature is a climate actor, not just a victim: ICJ recognizes ecosystems like forests, oceans, and coral reefs as active parts of the climate system. Eg: Forests absorb CO₂ and regulate rainfall.
    • Protecting nature is a legal climate duty: Countries have a responsibility to safeguard nature as part of their climate obligations. Eg: Wetlands must be preserved to manage floods and store carbon.
    • Ecological literacy is essential: Decision-makers must understand ecosystem roles in climate regulation. Eg: Mangrove destruction worsens storm impact and carbon release.
    • Biodiversity and climate are equal: Climate action must not come at the cost of biodiversity. Eg: Solar parks should not destroy grasslands or wildlife zones.
    • Global justice includes nature’s rights: The ICJ promotes a shift from human-centred to eco-centred justice. Eg: Legal personhood to rivers (like Ganga) aligns with this approach.

    How can India align the ICJ view with Articles 21 and 48A of the Constitution?

    • Recognize environmental rights as part of Right to Life (Article 21): Link clean air, water, and a healthy ecosystem to the fundamental right to life. Eg: Supreme Court’s recognition of the right to a healthy environment in the Subhash Kumar case.
    • Implement Directive Principle on environment (Article 48A): Strengthen policies to protect and improve forests, rivers, and biodiversity. Eg: Initiatives like Namami Gange align with this duty.

    What are the roles of Tribals in India’s climate plans?

    The roles of tribals in India’s climate plans are crucial because they are deeply connected with nature and are key to conservation and climate resilience.

    • Traditional Ecological Knowledge: Tribals have deep understanding of local ecosystems, useful for conservation and climate adaptation. Eg: Bhil tribes, Madhya Pradesh – traditional water harvesting for drought resilience.
    • Forest and Biodiversity Guardianship: Indigenous communities act as forest protectors and biodiversity custodians, aiding carbon sequestration. Eg: Dongria Kondh, Odisha – protect Niyamgiri Hills’ biodiversity.
    • Sustainable Livelihood Practices: Tribes follow low-carbon, eco-friendly practices, supporting climate goals. Eg: Apatani tribe, Arunachal Pradesh – eco-friendly wet rice farming (growing rice in flooded fields).
    • Community-Based Climate Adaptation: Local innovation enables faster climate resilience and resource management. Eg: Women in Kutch, Gujarat – build check dams for water security.
    • Effective Implementation of Climate Schemes: Grassroots involvement improves policy success, ensures inclusive development. Eg: Van Dhan Yojana – empowers tribal collectives for sustainable forest use.

    Which laws should India improve to better protect nature and fight climate change?

    • Strengthen Environmental Impact Assessment (EIA): Make public consultations more transparent and science-based. Eg: Dilution in EIA 2020 draft faced criticism for reducing oversight on polluting projects.
    • Amend Forest Conservation Act (FCA): Ensure tribal rights and ecological value are protected during land diversion. Eg: FCA 2023 allowed exemptions for some forest lands, risking biodiversity loss.
    • Update Air (Prevention and Control of Pollution) Act, 1981: Include stricter penalties and real-time monitoring for industrial emissions. Eg: Delhi’s recurring smog highlights the law’s limited deterrence.

    Way forward:

    • Empower Local Communities: Recognize and support tribal and grassroots climate efforts through legal rights, funding, and capacity building.
    • Mainstream Climate in Policy Planning: Integrate climate adaptation and mitigation into urban planning, agriculture, and infrastructure development.
    • Promote Green Finance and Innovation: Incentivize clean technologies, nature-based solutions, and public-private partnerships for sustainable development.

    Mains PYQ:

    [UPSC 2023] The most significant achievement of modern law in India in the constitutionalization of environmental problems by the Supreme Court. Discuss this statement with the help of relevant case laws.

    Linkage: The article highlights that India’s Supreme Court has interpreted Article 21 (right to life) to include the right to a healthy environment, and the ICJ’s opinion internationalizes this idea, providing a strong basis for India’s legal framework to embrace a restorative vision.

  • Assessing India’s Carbon Credit trading scheme targets 

    Why in the News?

    The Indian government recently set greenhouse gas (GHG) emissions intensity targets for key industrial sectors under its Carbon Credit Trading Scheme (CCTS). These targets apply to eight major industries, including steel, cement, aluminium, and textiles, and aim to reduce emissions per unit of production.

    What is CCTS?

    The Carbon Credit Trading Scheme (CCTS) allows entities—such as factories, refineries, or power plants—that emit less than their permitted carbon limits to earn carbon credits. These credits can then be traded with other entities that have exceeded their emission limits.

    What is the importance of assessing carbon targets at the economy-wide level?

    • Reflects true environmental impact: Evaluating targets at the economy-wide level ensures we understand the overall reduction in greenhouse gas emissions, which is the ultimate goal of climate action.
    • Enables flexible compliance: It allows efficient entities to overachieve and trade credits with less efficient ones, reducing total emissions cost-effectively. Eg: In India’s PAT scheme, cement plants exceeding targets sold energy-saving certificates to aluminium units lagging behind.
    • Aligns with national commitments: It supports the evaluation of whether India is on track to meet its Nationally Determined Contributions (NDCs) and net-zero targets, beyond fragmented sectoral views. Eg: India aims to reduce emissions intensity of GDP by 45% by 2030 – a goal only visible through economy-wide analysis.

    What is the PAT Scheme?

    The PAT Scheme sets energy efficiency targets for large, energy-intensive industries. Companies that exceed their targets earn Energy Saving Certificates (ESCerts), which they can trade with other companies that fail to meet their targets.

    How has the PAT scheme proven effective in reducing energy intensity?

    • Encouraged market-based efficiency: The Perform, Achieve and Trade (PAT) scheme allowed industries to meet energy targets using tradable efficiency certificates, creating a cost-effective compliance mechanism.
    • Achieved aggregate reduction: Despite mixed results at the entity or sector level, overall energy intensity in India declined across PAT cycles, proving its system-wide impact. Eg: Between 2012–14, even as chlor-alkali sector’s intensity rose, combined data showed less energy used per unit of output.
    • Enabled flexible transition: PAT helped industries adopt incremental improvements or buy credits instead of making costly in-house upgrades, ensuring participation without economic strain. Eg: Aluminium units improved production processes, while others chose certificate trading to meet targets.

    Why are entity-level targets insufficient to assess emission reduction?

    • Limited Scope of Impact: Targets at the entity level show progress in isolation and may miss the broader picture. For instance, even if some paper or chlor-alkali plants increase their energy use per unit of output, overall national emissions may still fall due to reductions in other sectors.
    • Focus on Transactions, Not Outcomes: These targets often guide financial trades between companies rather than ensuring actual emissions reduction. A steel plant may meet its target not by cutting emissions but by buying efficiency certificates from another unit.
    • Inconsistency Across Sectors: Emission reductions may vary widely across sectors. While cement and aluminium sectors may improve efficiency, others may lag. Solely relying on entity targets could misrepresent the real national decarbonisation progress.

    What limits the comparison of CCTS targets with past and future benchmarks?

    • Mismatch in Scope: The CCTS targets apply only to a part of India’s industrial base, making it difficult to compare them with economy-wide goals like the Nationally Determined Contributions (NDCs). Eg. CCTS covers only 8 industrial sectors, while NDCs span all sectors including agriculture and transport.
    • Changing Baselines and Ambition Levels: Past schemes like PAT Cycle I had relatively modest targets. Comparing them with current CCTS goals may underestimate the urgency for stronger action aligned with net-zero by 2070. Eg. A sector that achieved 1% reduction earlier may now require over 2.5% annual reduction to stay on track.
    • Different Indicators Used: Past targets often focused on energy intensity, while future goals (like NDCs) emphasise emissions intensity per GDP or value added, making direct comparison methodologically inconsistent. Eg. Comparing energy saved per unit of production vs emissions per unit of GDP distorts true climate ambition.

    How do CCTS targets align with India’s NDC and net-zero goals?

    • Partial Alignment with Emission Intensity Reduction: The CCTS targets aim to reduce emissions intensity in key industrial sectors, contributing to India’s NDC goal of reducing emissions intensity of GDP by 45% by 2030 (compared to 2005 levels). However, the annual reduction rateof ~1.68% in CCTS sectors is lower than the required pace for full alignment.
    • Lag Behind Power Sector Decarbonisation: Compared to the power sector, which has low-cost mitigation options and a projected 3.44% annual decline in emissions intensity, the industrial sector’s slower pace (~2.53%) under CCTS may hinder the broader net-zero pathway.
    • Need for Greater Sectoral Ambition: The current CCTS trajectory appears less aggressive than necessary for the 2070 net-zero target. Without scaling upambition across more sectors and tightening targets, CCTS alone cannot ensure full alignment with India’s long-term climate goals.

    Way forward: 

    • Enhance Sectoral Ambition with Dynamic Targeting: Revise CCTS targets periodically based on economy-wide modelling aligned with India’s NDC and net-zero goals, ensuring progressively stringent emission intensity reductions across all major industrial sectors.
    • Integrate Technology and Incentives: Promote adoption of clean technologies through financial incentives, carbon pricing, and capacity-building support to enable industries to decarbonize efficiently without compromising growth.

    Mains PYQ:

    [UPSC 2014] Should the pursuit of carbon credit and clean development mechanism set up under UNFCCC be maintained even through there has been a massive slide in the value of carbon credit? Discuss with respect to India’s energy needs for economic growth.

    Linkage: The article talks about the concept of “carbon credit,” which is a fundamental component of carbon trading schemes, including India’s Carbon Credit Trading Scheme (CCTS) which is related to the demand of the question.

  • UN Framework Convention on Climate Change (UNFCCC)

    Why in the News?

    The UN Framework Convention on Climate Change (UNFCCC) negotiations are facing a credibility crisis, as years of underperformance, weak accountability, and neglect of developing countries’ concerns have created growing frustration.

    About the UN Framework Convention on Climate Change (UNFCCC):

    • Overview: The UNFCCC is an international treaty adopted at the 1992 Rio Earth Summit to address climate change by stabilizing greenhouse gas (GHG) concentrations in the atmosphere.
    • Entry into Force: The Convention entered into force on 21 March 1994 and currently has 197 Parties, including all UN member states.
    • Governing Body – COP: The Conference of the Parties (COP) is the supreme decision-making body under the UNFCCC, which meets annually to assess progress and set new targets.
    • Consensus-Based Process: The Convention operates on the principle of consensus, meaning all Parties must agree for a decision to be adopted.
    • Article 2 Objective: The objective of the UNFCCC, as per Article 2, is to stabilize GHG levels at a point that prevents dangerous anthropogenic interference with the climate system.
    • Key Agreements: The UNFCCC framework led to major global climate agreements such as the Kyoto Protocol (1997) and the Paris Agreement (2015).
    • Institutional Structure: It has three main institutional bodies:
      1. SBSTA: Subsidiary Body for Scientific and Technological Advice
      2. SBI: Subsidiary Body for Implementation
      3. UNFCCC Secretariat: Headquartered in Bonn, Germany
    • Party Classifications:
      • Annex I: Developed countries (OECD + Economies in Transition); Obligated to reduce GHG emissions and submit regular reports.
      • Annex II: Subset of Annex I (OECD members); Required to provide financial and technological support to developing countries.
      • Non-Annex I: Developing countries; No binding emission targets but eligible for support and encouraged to act voluntarily.
      • LDCs (Least Developed Countries): Low-income, highly vulnerable nations; Receive priority support under UNFCCC for adaptation and capacity building.

    India and the UNFCCC:

    • Ratification: India ratified the UNFCCC in 1993 and has participated actively in all COP meetings since then.
    • Party Classification: India is classified as a Non- Annex I Party, meaning it has no binding emission reduction targets under the Convention.
    • Paris Agreement Commitments: Under the Paris Agreement (2015), India submitted Nationally Determined Contributions (NDCs), including:
      • Reducing emissions intensity of GDP by 45% by 2030 from 2005 levels
      • Achieving 50% cumulative electric power capacity from non-fossil fuel sources by 2030
    • Climate Diplomacy:
      • India advocates the principle of Common But Differentiated Responsibilities and Respective Capabilities (CBDR–RC) in all negotiations.
      • India co-founded the International Solar Alliance (ISA) and launched the LiFE Movement (Lifestyle for Environment) to promote sustainable lifestyles.
      • India has opposed unilateral trade measures such as the EU’s Carbon Border Adjustment Mechanism (CBAM) at multiple climate forums.

    Issues with the UNFCCC Process:

    • Weak Enforcement: The process lacks enforcement mechanisms; countries that fail to meet commitments face no penalties.
    • Consensus Delays: The consensus-based approach often leads to delays and diluted agreements due to the ability of a few nations to block progress.
    • Unmet Commitments: Developed countries have not fulfilled the promised $100 billion per year in climate finance, which was due by 2020.
    • Neglected Developing Country Needs: Critical needs for adaptation finance, capacity building, and technology transfer remain largely unmet for developing nations.
    • Controversial Host Nations: The selection of host countries (e.g., UAE for COP28 and Azerbaijan for COP29) has drawn criticism due to their fossil fuel dependence.
    • Demand for Reforms: At the Bonn Climate Conference (2024), developing countries called for reforms such as:
      • Shifting to majority-based decision-making
      • Imposing limits on fossil fuel industry participation in climate talks
    [UPSC 2016] With reference to the Agreement at the UNFCCC Meeting in Paris in 2015, which of the following statements is/are correct?

    1. The Agreement was signed by all the member countries of the UN and it will go into effect in 2017.

    2. The Agreement aims to limit the greenhouse gas emissions so that the rise in average global temperature by the end of this century does not exceed 2°C or even 1.5°C above pre-industrial levels.

    3. Developed countries acknowledged their historical responsibility in global warming and committed to donate $1000 billion a year from 2020 to help developing countries to cope with climate change.

    Select the correct answer using the code given below:

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

     

  • Rising seas, shifting lives and a test of democratic values

    Why in the News?

    India is seeing a worrying rise in people being forced to leave their homes due to climate change along its coasts, revealing serious gaps in how the country manages the environment and supports affected communities.

    What are the socio-economic impacts of coastal climate change?

    • Displacement of Coastal Communities: Rising sea levels, saltwater intrusion, and erosion force people from traditional coastal villages to resettlement colonies. Eg: In Satabhaya, Odisha, entire villages have been submerged, displacing residents with little access to sustainable livelihoods.
    • Loss of Traditional Livelihoods: Coastal degradation affects fishing and agriculture, disrupting long-standing economic systems. Eg: In Honnavar, Karnataka, fishing communities face livelihood loss due to mangrove destruction and tourism development.
    • Forced Migration to Urban Informal Sectors: Displaced people migrate to cities and enter unprotected labour markets, often in exploitative conditions. Eg: Many end up as construction or brick kiln workers in cities like Mumbai or Chennai, without labour rights.
    • Labour Exploitation and Gender Vulnerability: Migrants, especially women, face debt bondage, abuse, and trafficking due to informal employment and lack of legal safeguards. Eg: Displaced women entering domestic work are underpaid and vulnerable to exploitation.
    • Social Inequality and Lack of Legal Protection: The absence of targeted legal frameworks leads to exclusion from welfare schemes and labour protections, worsening socio-economic inequality. Eg: Existing laws like the BOCW Act, 1996, do not cover climate migrants, leaving them unprotected.

    How does climate-induced displacement test India’s democratic values?

    • Right to Life and Dignity (Article 21): Climate displacement challenges the constitutional guarantee of life with dignity, as displaced communities often lack shelter, healthcare, and livelihood.
    • Denial of Free, Prior, and Informed Consent (Article 19(1)(a)): Many infrastructure and tourism projects along the coast proceed without consulting local communities, violating their freedom of expression and participation in governance.
    • Suppression of Protest and Association (Article 19(1)(b) and 19(1)(c)): Environmental defenders and activists resisting unjust displacement face police action, surveillance, and criminalisation, undermining their freedom to protest and form associations.

    Why is a legal framework for climate migrants essential?

    • To Recognise and Protect the Rights of the Displaced: Climate migrants often lose access to housing, work, and basic services. A legal framework ensures their right to life and dignity is upheld under Article 21 of the Constitution. Eg: Villagers displaced from Satabhaya, Odisha, lack legal recognition as climate migrants, preventing access to structured rehabilitation.
    • To Fill Gaps in Existing Laws and Policies: Current laws like the Disaster Management Act, 2005 and CRZ Notification, 2019 focus on emergency response or environmental regulation, not long-term rehabilitation or labour rights. Eg: The NAPCC identifies vulnerability but has no mechanism to integrate displaced people into labour or housing policies.
    • To Prevent Labour Exploitation and Ensure Social Justice: Without legal safeguards, climate migrants, especially in urban informal sectors, face wage theft, abuse, and gendered violence. Eg: Migrants working in brick kilns or as domestic workers in cities remain outside labour codes, exposing them to exploitation.

    What is the role of local movements in protecting coastal communities?

    • Grassroots Resistance Against Destructive Projects: Local movements mobilize communities to protest against unsustainable infrastructure and industrial projects that threaten coastal ecosystems. Eg: The Save Satabhaya campaign in Odisha resisted sea-erosion-driven displacement and demanded proper rehabilitation.
    • Advocacy for Environmental Justice and Rights: These movements highlight environmental injustices, defend the livelihoods of traditional communities, and demand informed consent and legal protection. Eg: Pattuvam Mangrove Protection Movement.
    • Challenging Development Narratives and Policy Gaps: Local struggles question top-down development policies, push for sustainable alternatives, and expose policy loopholes that ignore climate and social impacts. Eg: Protests against the Adani port expansion at Ennore Creek, Tamil Nadu.

    Which reforms can ensure rights-based climate migration policies? (Way forward)

    • Legal Recognition of Climate Migrants: Integrate climate-induced displacement into national migration and disaster policies to ensure affected individuals are officially recognized and protected under law.
    • Labour Code Reforms for Informal Workers: Amend existing labour laws to include climate migrants, especially those in vulnerable sectors like construction and domestic work, ensuring fair wages, social security, and workplace protections.
    • Participatory Coastal Zone Management: Redesign Coastal Regulation Zone (CRZ) rules to prioritize ecological sustainability and the rights of local communities, with mandatory community consent before approving commercial projects.

    Mains PYQ:

    [UPSC 2024] What is sea surface temperature rise? How does it affect the formation of tropical cyclones?

    Linkage: The article highlights “rising seas, saltwater intrusion” and “coastal degradation” as impacts of climate change. This question directly relates to a key oceanic phenomenon influenced by climate change and its effect on extreme weather events like cyclones.

  • New Collective Quantified Goal (NCQG)

    Why in the News?

    With focus shifting to COP30, climate finance is in the spotlight as the Fourth International Financing for Development Conference (FfD4) works to finalise the New Collective Quantified Goal (NCQG) — a more ambitious target to replace the unmet $100 billion annual pledge.

    About New Collective Quantified Goal (NCQG):

    • Overview: It is a new global climate finance target under negotiation to replace the unmet $100 billion pledge made by developed countries in 2009.
    • Basis: It is being framed through the Meeting of the Parties to the Paris Agreement (CMA).
    • Minimum Starting Point: The goal will begin at a minimum of $100 billion per year, with future revisions based on real needs of developing nations.
    • Areas to be Covered: NCQG supports mitigation, adaptation, and resilience, with an explicit focus on the needs of developing countries.

    How it differs from earlier Pledge?

    • From Political to Need-Based: The earlier $100 billion was a political promise, while NCQG is a data-driven, needs-based goal.
    • Backed by National Priorities: Funding estimates will use developing countries’ own assessments and climate plans.
    • Greater Transparency and Trust: NCQG seeks to rebuild trust by addressing the trust deficit from past failures and improving accountability.

    True Scale of Climate Finance Needs:

    • Requirement: As per UNFCCC (2021), developing countries may need $6 trillion/year by 2030 to meet their climate goals.
    • Global Energy Transition Costs: A low-carbon global transition could need $4–6 trillion annually until 2050.
    • Renewable Energy Goals: Tripling renewables by 2030, agreed at COP28, may cost $30 trillion (IRENA).
    • India’s Stand: India has proposed an NCQG of $1 trillion/year, with a focus on grants and concessional finance, avoiding debt-heavy solutions.
    [UPSC 2024] Which one of the following launched the ‘Nature Solutions Finance Hub for Asia and the Pacific’?

    Options: (a) The Asian Development Bank (ADB) (b) The Asian Infrastructure Investment Bank (AIIB) (c) The New Development Bank (NDB) (d) The International Bank for Reconstruction and Development (IBRD)

     

  • Places in News: Kariyachalli Island

    Why in the News?

    The Tamil Nadu government, with World Bank support, has launched a ₹50 crore restoration project for the sinking Kariyachalli Island.

    About Kariyachalli Island:

    • Overview: Kariyachalli Island is one of the 21 uninhabited islands in the Gulf of Mannar Marine National Park.
    • Geographic Location: It lies 4 km south of Sippikulam and 20 km northeast of Thoothukudi, between Rameswaram and Thoothukudi.
    • Made of Reef Sediments: The island is a low-lying landform made of reef debris, sand dunes, spits, and sandy plains.
    • Biodiversity Hotspot: Located in India’s coral reef zone, it supports 4,300+ marine species, including 132 coral types and the endangered dugong.
    • Ecological Importance: It has seagrass beds and coral reefs that provide food and shelter for marine life.
    • Natural Coastal Shield: Kariyachalli acts as a barrier against cyclones and tsunamis, helping protect the Tamil Nadu coast.
    • Historical Significance: It played a role in mitigating the 2004 Indian Ocean tsunami impact.

    Why is it sinking?

    • Rapid Land Loss: The island has shrunk by over 70%, from 20.85 ha in 1969 to under 6 ha in 2024.
    • High Tide Erosion: At high tide, only 3.14 ha remains, per an IIT Madras (2025) study.
    • Wave and Sediment Pressure: Wave action, sediment loss, and lack of natural shoreline defense are accelerating erosion.
    • Climate Change Impact: Rising sea levels and coral bleaching have weakened the island’s natural protection.
    • Seagrass Depletion: Loss of seagrass beds has reduced the island’s ability to hold sediments and resist erosion.
    • Extreme Weather Events: Frequent cyclones and storms are making the island more vulnerable.
    • Future Risk: If the current trend continues, Kariyachalli may vanish by 2036.
    [UPSC 2023] Which one of the following is the best example of repeated falls in sea level, giving rise to present-day extensive marshland?

    Options: (a) Bhitarkanika Mangroves (b) Marakkanam Salt Pans (c) Naupada Swamp (d) Rann of Kutch*

     

  • Climate Threat Emerging from Rising Evaporative Demand and Thirstwaves

    Why in the News?

    Scientists have coined a new term, “thirstwave”, to describe spikes in evaporative demand, where a warmer atmosphere draws more water from plants, soil, and trees.

    What is Evaporative Demand?

    • Definition: Evaporative demand is the measure of how much water the atmosphere can potentially absorb from land, plants, and water surfaces if there is unlimited water available. It tells us how “thirsty” the atmosphere is.
    • Nature of Measurement: It is not about how much water is actually lost but how much could be lost if water was fully available. It depends on weather conditions, not the amount of water in the soil.
    • Standard Metric: The most widely used metric to quantify this is Standardized Short-Crop Reference Evapotranspiration (ETos)—which assumes a 12 cm grass surface with unlimited water availability.
    • Impact of Global Warming: As global warming increases atmospheric heat, evaporative demand also rises, making the air more “thirsty”.

    What is a Thirstwave?

    • Origin: “Thirstwave” is a newly coined term (2025) by Meetpal Kukal and Mike Hobbins to describe three or more consecutive days of extreme evaporative demand.
    • Definition: A thirstwave is a period of sudden and intense increase in evaporative demand, caused by hot, dry, and sunny weather. It means the atmosphere becomes extremely “thirsty” and starts pulling water rapidly from soil, plants, and water bodies, even if they already have limited moisture.
    • Distinction from Heatwaves: Unlike heatwaves, thirstwaves account for multifactorial stress, combining temperature, humidity, wind, and solar input.
    • Thirstwave in India: There is no dedicated data yet on thirstwaves in India, but researchers are beginning to investigate, especially in South Asia’s climate-vulnerable zones.
    [UPSC 2018] Which of the following leaf modifications occur(s) in the desert areas to inhabit water loss?

    1. Hard and waxy leaves

    2. Tiny leaves

    3. Thorns instead of leaves

    Select the correct answer using the code given below:

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

     

  • Rising Evaporative Demand and Thirstwaves

    Why in the News?

    Scientists have coined a new term, “thirstwave”, to describe spikes in evaporative demand, where a warmer atmosphere draws more water from plants, soil, and trees.

    What is Evaporative Demand?

    • Definition: Evaporative demand is the measure of how much water the atmosphere can potentially absorb from land, plants, and water surfaces if there is unlimited water available. It tells us how “thirsty” the atmosphere is.
    • Nature of Measurement: It is not about how much water is actually lost but how much could be lost if water was fully available. It depends on weather conditions, not the amount of water in the soil.
    • Standard Metric: The most widely used metric to quantify this is Standardized Short-Crop Reference Evapotranspiration (ETos)—which assumes a 12 cm grass surface with unlimited water availability.
    • Impact of Global Warming: As global warming increases atmospheric heat, evaporative demand also rises, making the air more “thirsty”.
    • Key Features:
      • Simplified Model: ETos simplifies evapotranspiration by assuming fixed vegetation properties and only variable weather conditions.
      • Indicators of Stress: An increase in ETos indicates higher temperatures, lower humidity, faster wind, and stronger solar radiation.
      • Effect on Soil and Crops: Rising evaporative demand leads to more rapid drying of soil and plants, even with ample irrigation.
      • Agricultural Relevance: This directly affects irrigation scheduling, crop productivity, and climate-resilient farming strategies.

    What is a Thirstwave?

    • Origin: “Thirstwave” is a newly coined term (2025) by Meetpal Kukal and Mike Hobbins to describe three or more consecutive days of extreme evaporative demand.
    • Definition: A thirstwave is a period of sudden and intense increase in evaporative demand, caused by hot, dry, and sunny weather. It means the atmosphere becomes extremely “thirsty” and starts pulling water rapidly from soil, plants, and water bodies, even if they already have limited moisture.
    • Distinction from Heatwaves: Unlike heatwaves, thirstwaves account for multifactorial stress, combining temperature, humidity, wind, and solar input.
    • Thirstwave in India: There is no dedicated data yet on thirstwaves in India, but researchers are beginning to investigate, especially in South Asia’s climate-vulnerable zones.
    [UPSC 2018] Which of the following leaf modifications occur(s) in the desert areas to inhabit water loss?

    1. Hard and waxy leaves

    2. Tiny leaves

    3. Thorns instead of leaves

    Select the correct answer using the code given below:

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

     

  • WMO’s State of the Climate in Asia 2024 Report

    Why in the News?

    The World Meteorological Organisation (WMO) has released its “State of the Climate in Asia, 2024” report.

    About the World Meteorological Organisation (WMO):

    • Overview: It is a specialised agency of the United Nations that deals with meteorology (weather and climate), operational hydrology, and related geophysical sciences.
    • Historical Origin: It was established in 1950, evolving from the International Meteorological Organisation (IMO), which was founded in 1873.
    • Headquarters Location: The headquarters of WMO is located in Geneva, Switzerland.
    • Global Coordination Role: WMO plays a key role in coordinating international efforts for climate data collection, forecasting, disaster preparedness, and climate change assessment.
    • Members: It has a membership of 193 members (187 member states + 6 Territories), including India.
    • Flagship Reports: WMO publishes annual climate reports such as the “State of the Climate” to highlight key trends and extreme weather impacts.

    Key Highlights of the State of the Climate in Asia – 2024 Report:

    • Record Warmth: 2024 was the warmest year on record in Asia, with heatwaves, extreme rainfalls, cyclones, and droughts devastating the region.
    • Global Temperature Spike: The global mean temperature reached its highest level since 1850, surpassing the 2023 record of 1.45°C.
    • Glacier Loss: 23 out of 24 monitored glaciers in the Himalayas and Tian Shan suffered mass loss, increasing the risk of glacial lake outburst floods (GLOFs).
    • Marine Heatwaves: Marine heatwaves of unprecedented extent and intensity affected Asian oceans, particularly around India, Japan, and China.
    • Major Cyclones: Cyclone Remal struck Bangladesh and India with 111 km/h winds and 2.5-metre-high storm surges; Asna and Fengal also caused major damage in Oman, Sri Lanka, and India.
    • Flash Floods and Landslides: Flash floods and landslides in Kerala, Nepal, and Sri Lanka resulted in hundreds of deaths and mass displacement.
    • Extreme Heatwaves: Heatwaves broke records across East and South Asia, including Japan, South Korea, China, Thailand, and India. Myanmar set a new national record at 48.2°C.
    • Severe Drought in China: Drought in China affected 4.8 million people, damaged over 335,000 hectares of crops, and caused losses of CNY 2.89 billion.
    [UPSC 2018] Momentum for Change: Climate Neutral Now” is an initiative launched by

    Options: (a) The Intergovernmental panel on Climate Change (b) The UNEP Secretariat (c) The UNFCCC Secretariat* (d) The World Meteorological Organization