Chiang Mai remains most air-polluted city in world
Chiang Mai on Saturday remained the most air-polluted city in the world for the second consecutive day, according to the AirVisual.com website.
AirVisual reported at 9.13am that the air quality index (AQI) of Chiang Mai on Saturday stood at 385, much higher than the 100 AQI safety standard.
The Nation Reporter