Huffpost Green

The Dirty Secrets Of Coal (PHOTOS)

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Coal is a dirty and dangerous business. It produces more than half of the energy in the U.S. because it is a cheap resource, but it comes at a high human and environmental cost. The coal industry is the single largest producer of greenhouse gas emissions -- and that's just the beginning. We're taking a look at some of the dirtiest secrets the coal industry doesn't want you to know.

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