This piece is a good comparison between coal and U3O8..
http://www.world-nuclear.org/info/in...
I didn't see mentioned in it that other than the noxious gaseous emmissions in coal..ALL coal contains mercury which comes out the stack too..A big problem...I worked on a govt.project that was trying to solve the problem..I'm long gone from there but the project is still being worked on...
No success yet..
ALL COAL contains mercury...bad stuff ..