Air quality in Thailand on Saturday morning. (Screenshot: IQAir)
The National Environment Board (NEB) will beef up preventive measures against PM2.5 ultrafine dust after 17 northern provinces have seen smog pollution hit crisis levels.
Siwaporn Rungsiyanon, a spokeswoman of the Centre for Air Pollution Mitigation (CAPM), said the 17 provinces have been seeing PM2.5 levels in excess of 100 microgrammes per cubic metre (µg/m3) since the middle of last month, as a result of slash-and-burn activities in nearby forests and farms.
The air there is considered far from safe as any PM2.5 level above 50 µg/m3 is considered unhealthy.
“The quality of air in the North is now at the highest alert, or the fourth level,” Ms Siwaporn said.
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