MNN Galleries

The 10 worst pollution problems in the world

Oct. 16, 2009, 11:21 p.m.
Smog-covered Bangkok

Photo: Effinity Stock Photography/iStockphoto

2 of 12

Urban air pollution

The residents of Bangkok, Thailand, are among the billions of people inhaling a fog of smoke, fossil-fuel emissions and car exhaust as they go about their daily lives. Health problems associated with outdoor air pollution are respiratory and cardiovascular disease, lung cancer, aggravated asthma and bronchitis.