Thailand takes another First
Posted: Sun Mar 01, 2020 9:26 am
https://www.nationthailand.com/news/30383081Chiang Mai’s air-quality ranking took a severe hit, with the city being named the worst in the world, followed by Mumbai, Kathmandu and Kolkata, the application Air Visual revealed on Saturday (February 29) as of 11.37am.
The application showed Chiang Mai’s average pollution at 193, with particulate matter less than 2.5 microns in diameter (PM2.5) at 137.8 micrograms per cubic metre.