As the end of 2025 approaches, regular folk take stock of the past year, and maybe ponder their New Year’s resolutions. Climate scientists, on the other hand, have been busy parsing mountains of data from the last 10 months, ranging from global temperatures to measurements of polar ice to the costs of extreme weather. Accordingly, their goal for 2026 might be to somehow make world leaders understand that humanity is running out of time to avert catastrophe.

A sobering tally of what the year’s data reveals about the state of the planet makes one thing clear: “We are hurtling toward climate chaos,” writes an international team of researchers. They add that recent climatic developments “emphasize the extreme insufficiency of global efforts to reduce greenhouse gas emissions and mark the be

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