UNEP: world set to cross 1.5°C within a few years
Where it stands
The UN Environment Programme (UNEP) released a report called Limiting Overshoot on 2 September 2026. The report says global warming is set to cross 1.5°C, likely within the next few years. UNEP says exceedance of 1.5°C is now widely assessed as unavoidable. The best remaining option is an 'overshoot, peak and decline' pathway. Under this pathway warming rises above 1.5°C, peaks, then falls back below 1.5°C. The most optimistic scenario in the report peaks at 1.8°C. Most other scenarios peak higher. The pathway needs deep emission cuts, including methane. The pathway also needs carbon dioxide removal and urgent adaptation. The report came out before COP31 in Antalya, Türkiye, in November 2026.
Background
The Paris Agreement was adopted on 12 December 2015. The agreement aims to hold warming well below 2°C above pre-industrial levels. The agreement also asks countries to pursue a 1.5°C limit. The year 2024 was the first calendar year above 1.5°C. The World Meteorological Organization put 2024 at about 1.55°C above the 1850-1900 average. One hot year does not breach the Paris limit. The Paris limit is measured over decades. UNEP's Emissions Gap Report 2025 said current pledges lead to 2.3°C to 2.5°C of warming. Current policies alone lead to up to 2.8°C.
How it developed
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December 2015 to November 2025How it started
The world was already heading past 1.5°C before the report
The Paris Agreement was adopted on 12 December 2015. The agreement holds warming well below 2°C and pursues efforts towards 1.5°C. Countries set their own targets in a Nationally Determined Contribution (NDC). The year 2024 was the first calendar year above 1.5°C. UNEP's Emissions Gap Report 2025 came out on 4 November 2025. The report said current pledges lead to 2.3°C to 2.5°C of warming. Current policies alone lead to up to 2.8°C. The report said 2030 emissions must fall 26 per cent from 2019 levels to keep overshoot near 0.3°C. Emissions in 2035 must fall 46 per cent.
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2 September 2026New fact
UNEP releases Limiting Overshoot: 1.5°C to be crossed within years
UNEP released Limiting Overshoot in Nairobi on 2 September 2026. The report says global temperature rise is set to cross 1.5°C, likely within the next few years. UNEP says exceedance of 1.5°C is now widely assessed as unavoidable. The most optimistic scenario peaks at 1.8°C above pre-industrial levels. Most other scenarios peak higher. UNEP Executive Director Inger Andersen said there are no good outcomes if the world stays above 1.5°C.
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2 September 2026New fact
UNEP's pathway: deep emission cuts, carbon removal, urgent adaptation
The report identifies an 'overshoot, peak and decline' pathway as the best remaining option. The pathway needs immediate and sustained cuts in greenhouse gases, including methane. The world must reach net zero and then go net negative. Carbon dioxide removal is needed in addition to cuts, not instead of cuts. Adaptation must advance together with emission cuts. UNEP warns that some losses will be irreversible even if warming returns below 1.5°C.
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2 September 2026Settled
Leaders point to COP31 in Antalya, 9 to 20 November 2026
UN Secretary-General António Guterres said the overshoot must be as small and short as possible. COP31 President-Designate Murat Kurum said exceeding 1.5°C should not be seen as a new destination. Kurum said COP31 must turn this urgency into concrete action. Australia's Chris Bowen, President of Negotiations for COP31, called the meeting an opportunity to turn ambition into action. COP31 will be held in Antalya, Türkiye, from 9 to 20 November 2026. India's Cabinet approved India's NDC for 2031-2035 on 25 March 2026.
Why it matters for UPSC
For GS3, know the Paris Agreement goals. The goals are well below 2°C and efforts towards 1.5°C. Do not confuse a single hot year with a breach of the limit. The year 2024 was above 1.5°C. The Paris limit is a long-term average over decades. UNEP now says that average will cross 1.5°C within a few years. Net zero balances emissions and removals. Net negative removes more than is emitted. Limiting Overshoot is a UNEP report, not a treaty change.
Key terms
Sources (8)
- UNFCCC · official · The Paris Agreement2 Sep, 5:45 pm
- World Meteorological Organization · official · WMO confirms 2024 as warmest year on record at about 1.55°C above pre-industrial level (10 January 2025)2 Sep, 5:45 pm
- UN Environment Programme · official · New climate pledges only slightly lower dangerous global warming projections (Emissions Gap Report 2025, 4 November 2025)2 Sep, 5:45 pm
- UN Environment Programme · official · UNEP: World set to cross 1.5°C global warming, but can still limit, adapt to and return from higher temperatures (2 September 2026)2 Sep, 5:45 pm
- Business Standard · UNEP says 1.5°C warming breach is inevitable, urges rapid emissions cuts2 Sep, 5:45 pm
- UNEP Knowledge Repository · official · Limiting Overshoot: Navigating exceedance of 1.5°C and pathways towards return (report record)2 Sep, 5:45 pm
- UNFCCC · official · The Road to Antalya (COP 31, 9 to 20 November 2026)2 Sep, 5:45 pm
- Press Information Bureau · official · Cabinet approves India's Nationally Determined Contribution (2031-2035) to be communicated to the UNFCCC (25 March 2026)2 Sep, 5:45 pm