PM2.5 annual mean (µg/m³), Southeast Asia + KR/CN/JP
Population-weighted annual average PM2.5 across Southeast Asia + Korea/China/Japan. Two sources with different methodology and coverage — switch above the chart: IQAir aggregates ground-station readings (2018 onward); the World Bank series is satellite + model-based (2018–2020) and additionally covers Brunei and Timor-Leste. Lower is better.