BANGKOK (The Nation/Asia News Network): About 200 residents of Mae Sai in Chiang Rai gathered at the district office on Monday (March 27) to demand urgent action to tackle soaring air pollution.
The move came after the district, which borders Myanmar, was engulfed in choking yellow smog. PM2.5 readings there surged to 542 milligrams per cubic metre (μg/m3) on Monday – more than 10 times above the safe limit.
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