Warning on warming: on the UNEP report, Limiting Overshoot
2-minute summary
The United Nations Environment Programme (UNEP) report, 'Limiting Overshoot', warns that breaching the 1.5°C global warming limit will cause irreversible damage that adaptation measures cannot fix. Even if all current climate pledges are met, the world is on track for a 1.8°C temperature rise, reaching 2.6°C under existing policies. The report advocates for an 'overshoot, peak, and decline' pathway, emphasizing rapid mitigation of non-CO2 greenhouse gases—specifically methane—to slow near-term warming. While over 155 countries have joined the Global Methane Pledge to cut emissions by 30% by 2030, India remains a non-signatory to protect its agricultural sector. However, India's traditional stance as a climate victim is being challenged. Following transboundary disasters like the Bhotekoshi floods, neighbors like Nepal are grouping India with top emitters like China and the US. The report highlights that India must transition away from a defensive victim mindset and proactively calibrate its climate diplomacy to address the realities of a 1.5°C world.
Why it's in the news
The UNEP released its 'Limiting Overshoot' report in September 2026, highlighting the high probability of temporarily breaching the 1.5°C warming threshold and urging immediate global action on short-lived climate pollutants like methane.
Background and context
The Paris Agreement (2015) set a target to limit global warming to well below 2°C, preferably 1.5°C, compared to pre-industrial levels. However, continuous emission trajectories indicate that a temporary breach of this limit—known as 'temperature overshoot'—is increasingly inevitable. To prevent permanent ecological damage, scientists advocate for rapid mitigation of short-lived climate pollutants (SLCPs) like methane, which has a global warming potential over 80 times that of carbon dioxide over a 20-year period. At COP26 in 2021, the Global Methane Pledge was launched to reduce global methane emissions by 30% by 2030. India has resisted joining this pledge because the bulk of its methane emissions originates from enteric fermentation (livestock) and wet paddy cultivation, which are deeply tied to the food security and livelihoods of millions of small and marginal farmers.
Constitutional provisions
- Article 48A — Directive Principles of State Policy directing the State to endeavor to protect and improve the environment and safeguard forests and wildlife.
- Article 51A(g) — Fundamental Duty of every citizen to protect and improve the natural environment including forests, lakes, rivers, and wildlife.
Committees and reports
- Limiting Overshoot Report, UNEP — Highlights the dangers of exceeding the 1.5°C warming limit and outlines the 'overshoot, peak, and decline' pathway with a focus on non-CO2 gases.
- IPCC Sixth Assessment Report (AR6) — Emphasized that global greenhouse gas emissions must peak before 2025 and be reduced by 43% by 2030 to limit warming to 1.5°C.
Government schemes
- Gobar-Dhan (Galvanizing Organic Bio-Agro Resources Dhan) Scheme — Supports biodegradable waste management and reduces methane emissions from cattle dung by converting it into biogas.
- National Mission for Sustainable Agriculture (NMSA) — Promotes climate-resilient agronomic practices, including Direct Seeded Rice (DSR) and System of Rice Intensification (SRI) to reduce water use and methane emissions.
International organisations
- United Nations Environment Programme (UNEP) — The leading global environmental authority that sets the global environmental agenda and promotes coherent implementation of environmental dimensions within the UN system.
- Climate and Clean Air Coalition (CCAC) — A global partnership of governments and non-state partners committed to reducing short-lived climate pollutants (methane, black carbon, HFCs) to protect human health and the climate.
Previous UPSC questions on this theme
- Prelims GS-1 2021 — In the context of India's preparation for Climate-Smart Agriculture, consider the following statements : 1. The 'Climate-Smart Village' approach in India is a part of a project led by the Climate Change, Agriculture and Food Security (CCAFS), an international research programme. 2. The project of CCAFS is carried out under Consultative Group on International Agricultural Research (CGIAR) headquartered in France. 3. The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) in India is one of the CGIAR's research centres. Which of the statements given above are correct? (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3
Mains practice: Analyze the strategic and diplomatic challenges India faces as global climate discourse shifts towards 'temperature overshoot' and short-lived climate pollutants like methane. How should India recalibrate its climate policy?
The UNEP 'Limiting Overshoot' report highlights that breaching the 1.5°C warming limit will cause irreversible ecological damage. As the global focus shifts toward an 'overshoot, peak, and decline' pathway, India faces distinct strategic and diplomatic challenges.
**Strategic and Diplomatic Challenges:**
• **Pressure on Methane Mitigation:** The report identifies methane reduction as the fastest way to slow near-term warming. India, a non-signatory to the Global Methane Pledge, faces mounting pressure to curb agricultural emissions. However, doing so directly threatens the food security and livelihoods of its massive smallholder farming population.
• **Shifting Regional Perceptions:** Historically, India has maintained a 'victim' stance based on low per-capita emissions. However, transboundary disasters in the Hindu Kush Himalayas—such as the Bhotekoshi floods—have led neighbors like Nepal to group India with top global emitters like China and the US, eroding India's regional moral leadership.
• **Adaptation Finance Deficit:** The global shift toward mitigation of overshoot risks sidelining the urgent need for adaptation finance, which developing nations like India desperately require to build resilience against extreme weather events.
**Way Forward and Recalibration:**
• **Proactive Domestic Actions:** India should scale up domestic methane mitigation through non-coercive measures, such as promoting Direct Seeded Rice (DSR), System of Rice Intensification (SRI), and expanding the Gobar-Dhan scheme to utilize agricultural waste.
• **Neighborhood Climate Diplomacy:** India must lead the creation of a South Asian Climate Coalition to jointly manage transboundary ecological risks, share early warning systems, and address Glacial Lake Outburst Floods (GLOFs).
• **Calibrated Messaging:** India must transition from a defensive 'victim' narrative to a 'responsible global power' narrative, highlighting its massive renewable energy expansion while firmly demanding technology transfers and equitable adaptation finance.
In conclusion, India must acknowledge the reality of a 1.5°C world and strategically align its domestic agricultural policies with proactive regional climate diplomacy to safeguard both its developmental interests and geopolitical leadership.
Prelims practice questions
Q1. With reference to the Global Methane Pledge, consider the following statements: 1. It was launched at COP26 with the goal of reducing global anthropogenic methane emissions by at least 30% below 2020 levels by 2030. 2. India is a founding signatory of this pledge. 3. Methane has a shorter atmospheric lifetime than carbon dioxide but a significantly higher global warming potential. Which of the statements given above are correct?
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Answer: C. Statement 1 is correct: The Global Methane Pledge was launched at COP26 (2021) to reduce global methane emissions by 30% by 2030. Statement 2 is incorrect: India is not a signatory to the pledge due to concerns over its impact on agriculture and livelihoods. Statement 3 is correct: Methane remains in the atmosphere for about 12 years (much shorter than CO2) but has a warming potential over 80 times greater than CO2 over a 20-year period.
Q2. Which of the following reports is/are published by the United Nations Environment Programme (UNEP)? 1. Emissions Gap Report 2. Adaptation Gap Report 3. Global Environment Outlook 4. World Economic Outlook Select the correct answer using the code given below:
- 1 and 2 only
- 1, 2 and 3 only
- 2, 3 and 4 only
- 1, 2, 3 and 4
Answer: B. The Emissions Gap Report, Adaptation Gap Report, and Global Environment Outlook (GEO) are flagship publications of the UNEP. The World Economic Outlook is published by the International Monetary Fund (IMF).
Q3. In India, which of the following sectors contributes the largest share of anthropogenic methane emissions?
- Municipal solid waste and landfills
- Coal mining and fugitive emissions
- Agriculture and livestock
- Biomass and fossil fuel combustion
Answer: C. According to India's national greenhouse gas inventory, the agricultural sector—primarily enteric fermentation from livestock and paddy rice cultivation—is the largest contributor to anthropogenic methane emissions in the country.
Revision flashcards
- What is 'temperature overshoot' in climate science? A scenario where global average temperatures temporarily exceed a target threshold (such as 1.5°C) before cooling back down below it through intensive mitigation and carbon dioxide removal.
- Why has India abstained from signing the Global Methane Pledge? Because over 70% of India's methane emissions come from agriculture (livestock enteric fermentation and wet paddy fields). Restricting these emissions could impact food security and rural livelihoods.
- What is the target of the Global Methane Pledge? To reduce global anthropogenic methane emissions by at least 30% below 2020 levels by the year 2030.
- How does methane compare to carbon dioxide as a greenhouse gas? Methane has a much shorter atmospheric lifetime (approx. 12 years vs. centuries for CO2) but has a global warming potential (GWP) over 80 times higher than CO2 over a 20-year timescale.
- Which transboundary river basin disaster in Nepal was highlighted as a warning for regional climate impacts in 2026? The Bhotekoshi disaster, which underscored the vulnerability of small Himalayan nations to climate change and altered regional perceptions of India's emissions.