In anthracite we have the worlds greatest (convenient) heat source
However, we need a good way of converting heat straight into electricity
http://www.sciencedaily.com/releases/20 ... 150340.htm
Trouble is we can't store the stuff efficiently
http://www.uraniumstar.com/_resources/V ... ebsite.pdf
Where is all that vanadium to come from?
http://finance.yahoo.com/news/Uranium-S ... l?x=0&.v=1