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1 .This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.
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2 .What happens when 900 million metric tons of coal get burned?
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3 .Roughly 100 million metric tons of coal ash is created, a residue laced with nasty elements like arsenic, lead and mercury.
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4 .We perform this transformation every year in the U.S.
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5 .Storing all that ash is a challenge.
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6 .That's why roughly 4 billion liters of the toxic stuff mixed with water was left to sit in a massive pond near Kingston, Tennessee.
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7 .Five years ago on December 22, that pond burst its walls, drowning more than a square kilometer of land and killing portions of the Emory and Clinch rivers.
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8 .The Tennessee Valley Authority has been cleaning up the so-called Christmas coal ash flood ever since.
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9 .But such catastrophic events are not the only way coal ash gets into our waterways.
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10 .Rainwater can percolate through the ash when it's improperly stored.
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11 .A new report from a non-profit advocacy organization called the Environmental Integrity Project shows that the groundwater near TVA coal-fired power plants is contaminated with a toxic stew of elements.
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12 .The issue extends well past TVA jurisdiction.
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13 .More than 580 coal ash sites exist across the U.S.
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14 .We should work to get all that ash safely disposed of before another five Christmases pass.
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15 .Your minute is up, for Scientific American 60-Second Earth. I'm David Biello,
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