His point, in general, is that it's much cleaner than coal; which it is. You guys, I don't know, assumed that everyone in this thread thought it came from green fairies or something, such a blindingly large straw man that it's almost obscene. The difference between coal mining waste, and uranium mining waste is enormous, it's not even on the same level. If you look at the uranium waste, it can actually have soil and growth over it, the worst aspects being radon release (But that's not different from normal in these areas, due to the uranium in the ground). Coal slurry though is a toxic shit pile that literally needs to be damned in a pit. The scales of the environmental effects are enormously different--and so, it's pretty easy to say, Uranium mining is relativelyvery cleanby comparison.
Also, yes, U-235 is only sub 1% of uranium, but reactors don't need pure 100% 235. It only needs to be enriched from 1% to 5% concentration.