- RESEARCH HIGHLIGHT
A heatwave in 2025 would have been one-third of a degree cooler without the greenhouse gases released since 2015.
A pedestrian in Rome shelters from the Sun during a heatwave that hit Europe in June 2025. Credit: Andrea Ronchini/NurPhoto/Getty
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doi: https://doi.org/10.1038/d41586-026-03035-w