Thai PM bemoans open burning as Chiang Mai tops world pollution index again

A thick layer of smog covers the city of Chiang Mai, northern Thailand, on, March 29, 2023. - AP

BANGKOK (The Nation/Asia News Network): As Chiang Mai residents choke under the world’s worst air pollution, PM Prayut Chan-O-Cha has promised action on smog but admitted efforts to prevent burning fields that feed it had failed.

Chiang Mai has topped the air-pollution rankings for world cities over the past week, according to Swiss air quality company IQAir.