If we had more Pigovian taxes in the US (i.e. a carbon tax), the cost of coal would more accurately include all of negative effects (or externalities) it has.

If we had more Pigovian taxes in the US (i.e. a carbon tax), the cost of coal would more accurately include all of negative effects (or externalities) it has. http://en.wikipedia.org/wiki/Pigovian_tax http://en.wikipedia.org/wiki/Pigovian_tax