TreeHugger has covered the issue of mountaintop removal coal mining number of times. We've also firmly been behind the idea that there really is no such thing as clean coal; that when its mined, when its burned and when the waste is disposed of, coal is an inherently dirty product. No advertising campaigns to the contrary by the coal industry can prevent that, though they certainly try.
In case you needed any ammunition to support that argument, The Dirty Lie campaign has released some short video clips on the myth of clean coal. Mountaintop coal mining is above, the Miraculous Mercury Baby is below: