Northern provinces in Thailand, especially Chiang Rai and Chiang Mai, have been engulfed in dangerous levels of PM2.5 dust pollution from wildfires and agricultural burning in Myanmar and Laos. Mr. Suwannachai Wattanayingcharoenchai, director-general of the Health Department, stated that PM2.5 levels exceeded 91 microgrammes per cubic metre (g/m3) of air in eight northern provinces: Chiang … Continue reading PM2.5 Air Pollution at Toxic Levels in Chiang Rai, Thailand