How Power Grids Work

UP NEXT: The Deadly Problem of Coal Ash

After Hurricane Matthew in 2016, Waterkeeper Alliance and Sound Rivers discovered a layer of coal ash more than an inch thick on the Neuse River from the Duke Energy H.F. Lee facility spill.

Disposing and storing coal ash is tricky, and it takes one small trigger to cause a catastrophe. HowStuffWork looks at coal ash and the environment.

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