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Coal Ash Spill

Signs of coal ash swirl in the water in the Dan River in Danville, Va. Duke Energy estimates that up to 82,000 tons of coal ash has been released from a break in a 48-inch storm water pipe at the Dan River Power Plant in Eden N.C., Wednesday, Feb. 5, 2014. (AP Photo/Gerry Broome)

Coal ash spill

North Carolina regulators had for years allowed the nation's largest power company to pollute the ground near its plants without penalty. But in early 2013, a coalition of environmental groups sued to force Duke to clean up nearly three dozen leaky coal ash dumps spread across the state.

So last summer, Duke Energy turned to North Carolina lawmakers for help. (AP)

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