UN report says 1.5°C warming inevitable, urges deeper emission cuts

September 7, 2026 at 06:13 PM1 min

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The United Nations has acknowledged that limiting global warming to 1.5°C above pre-industrial levels is no longer achievable. A new UN report states the threshold will be exceeded in the coming years, with current policies leading to 2.6°C by 2100. The report urges treating 1.5°C as a minimum target and accelerating emission reductions.

Key Facts

The UN report states that a 1.5°C temperature rise above pre-industrial levels is now inevitable and will occur in the coming years.
If all climate pledges are fulfilled, the UN projects warming of at least 1.8°C; under current policies, it could reach 2.6°C by 2100.
UN Environment Programme Executive Director Inger Andersen said the 1.5°C goal remains relevant and that every tenth of a degree matters.
The report calls for sustained CO2 emission reductions in the second half of the century and additional cuts in other greenhouse gases.

The 1.5°C Threshold

The UN report acknowledges that the window to prevent a 1.5°C temperature rise has already closed. Scientists link this threshold to dangerous tipping points, including disruption of ocean currents, rapid permafrost thaw, and loss of tropical coral reefs. Current global temperatures are estimated to be about 1.4°C above pre-industrial levels. The report suggests treating 1.5°C not as an upper limit but as a minimum level to be maintained in the future.

Emission Reduction Pathways

To keep warming near 1.5°C, the world must achieve sustained reductions in carbon dioxide emissions in the second half of the century. Additional cuts in other greenhouse gases will also be necessary, according to the report. The report's authors stress that decisions made now will determine whether the chance to hold warming around 1.5°C remains. UNEP Executive Director Inger Andersen told CBC News that reducing warming by even a tenth of a degree can lessen future damage.