IRENA国际可再生能源机构：2025年气候行动支持报告（英文版）

The years leading up to 2030 are critical to put the world back on course to keep global temperature rise to within 1.5°C of pre-industrial levels. According to the World Meteorological Organization’s State of the Global Climate 2025, atmospheric concentrations of major greenhouse gases – carbon dioxide (CO2 ), methane and nitrous oxide – reached their highest levels in 800 000 years in 2023 (WMO, 2025a). In 2024, the global average surface concentration of CO2 reached 423.9 parts per million