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Big Environmental Disasters

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Kingston Fossil Plant coal fly ash slurry spill. On December 22, 2008, an earthen wall holding back 1.1 billion gallons of coal fly ash slurry ruptured at the Tennessee Valley Authority's Kingston Fossil Plant in Roane County, Tennessee. The toxic sludge spread over 300 acres, poisoning river water and decimating the marine wildlife population.

PHOTO: J. Miles Cary/Knoxville News Sentinel/AP/File

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