BANGKOK -- Air pollution, mostly from forest fires and slash-and-burn farming, continues to plague Southeast Asia, with PM2.5 particulate concentrations among the highest in the world in some areas.
Environment
Dirty air in Laos, Thailand casts pall over health, tourism
Southeast Asian nations now have world's worst particulate concentrations
The city of Chiang Mai in northern Thailand under a haze of air pollution on April 9. (Photo by Ken Kobayashi)
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