Bangkok, Chiang Mai among world's worst cities for air pollution

After the floods, air pollution follows in Thailand. Bangkok and Chiang Mai have made it into the top 50 cities worldwide for small dust particle pollution, according to the latest data from Swiss-b… [+1616 chars]

Bangkok, Chiang Mai among world's worst cities for air pollution

Bangkok, Chiang Mai among world's worst cities for air pollution

Bangkok, Chiang Mai among world's worst cities for air pollution

Bangkok, Chiang Mai among world's worst cities for air pollution

Bangkok, Chiang Mai among world's worst cities for air pollution