This exposes more of the hidden costs of coal (which Steve of W. accurately identified as really just sequestered carbon). Problem is you clean it up some in one way, for example with air scrubbers, and it results in more pollution somewhere else, for example coal ash. And this doesn't even address carbon pollution or mining damage and its resulting pollution!

Coal is just too dirty and once we face up to its real costs, it is no longer cheap. Is it really cost competitive with clean renewables, let alone cheaper at all? It's hard to see how. At least the senior senator from coal country has gotten the picture.