Levels of hazardous ultra-fine PM2.5 dust particles in the air in the North – particularly in Chiang Mai – on Saturday reached a record high, raising concerns among tourism operators that the situation will affect tourism and travel patterns.
Levels of hazardous ultra-fine PM2.5 dust particles in the air in the North particularly in Chiang Mai on Saturday reached a record high, raising concerns among tourism operators that the situation will affect tourism and travel patterns.