WHO世界卫生组织：2025年高温、空气污染和太阳紫外线辐射：大型集会的特定考虑和研究空白报告（英文版）

The annually averaged global mean near-surface temperature in 2024 was 1.55 °C ± 0.13 °C above the 1850–1900 average. This made it the warmest year in the 175-year observational record, beating the previous record set only the year before. The problem of extreme heat, however, does not exist in isolation. As temperatures rise, air pollution levels can also increase and deplete the ozone layer, allowing more dangerous solar ultraviolet (UV) radiation. Workers and attendees at sports events and