Air pollution worsens in northern Thailand as 300,000 receive treatment for smog

Chronic air pollution makes Thailand's Chiang Mai world's most polluted city

Safari animals sprayed with water to ease suffocating air pollution in Thailand

Forest fires cause air pollution in northern Thailand

Air pollution blankets Chiang Mai, northern Thailand

Toxic PM 2.5 air pollution hits northern Thailand

Air pollution reaches dangerous levels in Bangkok as smog covers city

Air pollution reaches dangerous levels in Bangkok as smog covers city

Air pollution clouds Bangkok as 'dust dome' forms over city

Air pollution smothers Bangkok reaching dangerous levels

Air pollution returns to Bangkok as cold weather front from China weakens