02/23/2015 09:44 am ET Updated Feb 23, 2015

Toxic Waste in the U.S.: Coal Ash

Coal ash, which contains many of the world's worst carcinogens, is what's left over when coal is burnt for electricity. An estimated 113 million tons of coal ash are produced annually in the US, and stored in almost every state — some of it literally in people's backyards.

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