Air pollution caused by PM2.5 ranks Chiang Mai as the world's most polluted city
epa11222143 A Royal Thai Air Force aircraft lands amid smog from heavy concentrations of fine particulates matter PM2.5, at Chiang Mai international airport in Chiang Mai province, northern Thailand, 15 March 2024. The air pollution caused by wildfires contributing heavily hazardous air quality in the city of Chiang Mai is escalating to health harmful levels with the measured amount of PM2.5 dust making the tourist spot city most polluted city in the world on 15 March 2024. EPA/RUNGROJ YONGRIT
