With forest fires contributing to the high levels of PM2.5 pollution – airborne particulates 2.5 microns or less in diameter
CHIANG RAI – Although it was the last day of the ban on the outdoor burning ban in nine northern provinces on Tuesday, multiple forest fires continued to be a problem.
A satellite report cited 107 hotspots in the region on Monday with 35 locales in Chiang Rai and 15 sites in Chiang Mai.