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