By Daniel Stone and Karsten Moran
As many as 40 percent of the world's deaths can be attributed to some form of pollution, according to a new report on the planet's worst environmental hazards. Smog, sewage, radioactivity, mining and battery recycling are among the most lethal culprits, according to the study from the Blacksmith Institute and Green Cross of Switzerland, which aimed to "increase awareness of the severe toll that pollution takes on human health." The planet's 10 worst pollution problems (unranked in the Oct. 21 report), are reflected in these images.
