The report’s lowest-warming scenario would limit peak warming to approximately 1.7°C to 1.8°C above pre-industrial levels, according to Inside Climate News. The finding describes the outcome of the most ambitious scenario identified in the reporting, rather than a projection of a specific future date for peak warming.
Inside Climate News reports that reaching this scenario would require greenhouse-gas emissions to fall by 18% by 2030, 45% by 2035 and 69% by 2040, relative to 2025 levels. It would also require substantial removal of carbon dioxide from the atmosphere, including measures such as reforestation and the development of carbon-capture technologies that the report describes as being at an early stage.
The assessment does not mean that the 1.5°C target should be abandoned, Inside Climate News reports, citing UNEP Executive Director Inger Andersen. The report instead presents the target alongside projections showing that current emissions-reduction scenarios do not make it a realistic outcome.
The reporting also identifies contrasting trends in the energy transition. Renewable-energy capacity, particularly in wind and solar power, has expanded faster than anticipated, according to Inside Climate News, while emissions from the combustion of oil, gas and coal continue to rise.
Inside Climate News published its report on October 21, 2026. EL PAÍS published an opinion item on October 22 that also described a United Nations warning about the 1.5°C threshold; the item is an opinion article rather than an independent technical assessment.