The Emissions Gap Report 2026 and the End of the No-Overshoot Pathway

The United Nations Environment Programme released the seventeenth edition of its Emissions Gap Report in the week before COP31, and the title is the argument: "The Point of Return". The report does not say that 1.5°C is impossible. It says something narrower and more awkward. The chance of holding warming to 1.5°C with no overshoot, or with limited overshoot, has been lost, and the question is now how far past the line the world goes and whether it can come back.

That distinction is the part most coverage will flatten. A peak above 1.5°C, a return to 1.5°C by 2100, and a permanent overshoot are three different futures with three different costs. The report's central finding is that the third is now the default and the second is still arithmetically available, but only on a pathway that assumes a technology nobody has deployed at scale.

What the report actually says

The report works with a lowest-overshoot scenario. On that pathway there is a 66 per cent chance of limiting peak warming to between 1.7°C and 1.8°C, and a 50 per cent chance of coming back to 1.5°C by 2100. Both halves of that sentence matter. The peak is higher than the target, and the return is a coin toss even if the world begins cutting immediately.

The arithmetic of delay is the clearest number in the report. Every five years of emissions at current levels adds roughly 200 gigatonnes of carbon dioxide and about 0.1°C of peak warming. Delay is not a plateau. It is a ratchet.

Under current policies, warming reaches about 2.8°C by 2100. Full implementation of all submitted national pledges brings that to 2.6°C. Adding every net-zero pledge that has been announced brings it to 2.1°C. The Paris Agreement has pulled the projection down from about 4°C, which is a genuine achievement, and it has not pulled it down far enough.

Scenario	Projected warming in 2100
Current policies	About 2.8°C
All submitted pledges implemented	About 2.6°C
All pledges and net-zero promises	About 2.1°C
Lowest-overshoot pathway	Peak of 1.7°C to 1.8°C, return to 1.5°C by 2100

Why the return pathway is the weak point

Coming back to 1.5°C after overshoot requires removing carbon dioxide from the atmosphere, not merely emitting less. The report puts the requirement at about 320 gigatonnes over the century. That is roughly eight years of current global emissions, and it has to be taken out of the air rather than avoided at the smokestack.

The technologies that could do this are not ready. Afforestation and soil carbon are real but limited and reversible. Bioenergy with carbon capture and storage, and direct air capture, exist at demonstration scale and cost far more than the carbon price in most markets. The report says the feasibility of large-scale removal is uncertain, which is a polite way of saying that the return pathway rests on an assumption rather than a plan.

This is the point at which a student should be careful. It is not correct to say the report predicts 1.7°C. It says that a pathway exists on which the peak is 1.7°C to 1.8°C, conditional on immediate and steep cuts and on carbon removal at a scale never achieved. The conditional is the finding.

The gap is narrowing for the wrong reason

The report notes that the 2030 implementation gap appears to be narrowing, and then explains that the narrowing is largely an artefact of the United States withdrawing from the Paris Agreement. Emissions fall out of the accounting when a country leaves, without a tonne of carbon being avoided. A smaller gap on paper is not progress in the atmosphere.

The concentration of responsibility is stark. The G20, excluding the African Union, accounts for about 76 per cent of global greenhouse gas emissions, and under current policies only six of its members are projected to meet their unconditional 2030 pledges. The report also records that 124 parties, covering 76 per cent of emissions, had submitted new pledges by September 2026, but that their combined effect on projected warming is negligible.

Two structural facts sit underneath. Renewable capacity is growing about three times faster than was projected in 2015, and solar photovoltaic seven times faster, with global capacity possibly reaching 11,500 gigawatts by 2030. Electric vehicles are around one in four cars sold worldwide. At the same time, fossil fuel consumption and subsidies are still rising, and deforestation would have to fall more than ten times faster to meet the 2030 target. Adding clean supply while expanding the dirty one produces a slower rise, not a fall.

India's position

India is the third largest absolute emitter at roughly 4.5 gigatonnes of carbon dioxide equivalent, after China and the United States. Its per capita emissions are about 3.1 tonnes, against a world average of 6.4 tonnes, which is the factual basis of the equity argument and should be stated as a fact rather than as a defence.

India is one of the six G20 members projected to meet its unconditional 2030 target under current policies. That is a real result, produced by the renewable build-out, the carbon credit trading scheme and rooftop solar. The report then adds the caveat that matters for anyone writing an answer: India's target is an emissions intensity target, not an absolute one. Intensity is emissions per unit of output. If the economy grows faster than intensity falls, absolute emissions rise. The report projects exactly that between 2030 and 2035.

Only India, Tunisia and Uzbekistan retain intensity targets among the parties that submitted new pledges. That is not a criticism of India, because intensity targets are legitimate under the principle of common but differentiated responsibilities and India's per capita share is low. It is a warning about how the target should be described. A claim that India's emissions are falling would be wrong. A claim that India is meeting its pledge while absolute emissions rise is correct, and the two are compatible only because of the choice of metric.

What Antalya can and cannot do

COP31 meets in Antalya from 9 to 20 November. It will not produce a new global agreement, and the Emissions Gap Report is not an agenda item that binds anyone. Its function is to set the factual baseline against which the finance and adaptation arguments are made.

The report's implicit ask is that parties treat the gap as a delivery problem rather than a target-setting problem. The pledges already submitted, if fully implemented, still leave the world at 2.6°C. A new round of more ambitious pledges that are not implemented would change nothing. The test at Antalya is therefore not the number of new announcements but whether the machinery for implementation, reporting and finance has dates attached.

What to watch

• Whether COP31 adopts a work programme with dated milestones on fossil fuel transition, or repeats the language of Belém without a calendar.
• Whether the adaptation finance line is treated as a subset of the 300 billion dollar goal or as additional to it.
• India's submission on the Global Stocktake follow-up, and whether it continues to defend the intensity metric explicitly rather than leaving it unexplained.
• The first annual report of the carbon credit trading scheme, which is the domestic instrument that has to carry India's mitigation claim.

Quick answers

What is the Emissions Gap Report? An annual UNEP assessment of the gap between pledged emission cuts and the cuts needed to meet the temperature goals of the Paris Agreement.

What is new in the 2026 edition? It states that the no-overshoot pathway to 1.5°C is no longer available, and that the return pathway depends on about 320 gigatonnes of carbon dioxide removal.

Why does the India section matter? India is projected to meet its intensity target while absolute emissions rise to 2035, because intensity is measured per unit of output.

Sources

1. United Nations Environment Programme, Emissions Gap Report 2026, "The Point of Return". October 2026. https://www.unep.org
2. UNFCCC, COP31 Antalya, conference dates and agenda. https://unfccc.int/cop31
3. UNFCCC, first Global Stocktake decision, COP28. 2023. https://unfccc.int
4. Ministry of Environment, Forest and Climate Change, India's Nationally Determined Contribution. https://moef.gov.in
5. Intergovernmental Panel on Climate Change, Sixth Assessment Report, synthesis. 2023. https://www.ipcc.ch