I'll quantify my statement. There's no way to economically burn coal in a clean way. Perhaps if delivery and distribution was near perfect... This is kind of the lightbulb thing. Sure, I can make you an LED lamp that's going to last for 50 years. It's going to cost you $10k because of all of the special hand engineering that goes into making it. The $3 unit you get at the store that lasts for 5 years is a major compromise in engineering to get cheap manufacturability. Nuclear still wins when it comes down to it.