The pro-nuclear power Atomic Insights Blog on why coal is dirty, pollutes massively, and is a poor energy source in the first place.
Coal is an inherently dirty fuel that is naturally contaminated with many dangerous and polluting chemicals. It has a relatively low energy density, even when compared to its fossil fuel competitors. That low energy density means that producing large amounts of power requires moving vast quantities of often difficult to reach material.
Instead of proudly continuing to burn more than a billion tons of coal each year, the US should show the world the way to cleaner electricity production by building new nuclear power plants and shutting down coal-fired boilers.
http://www.youtube.com/watch?v=vi1y2ASK9j4&feature=player_embedded
They link to the Coal Free Future Project and their new multi-media play that will be touring soon.