[pfdietz]

If you fully fission the U + Th in an average chunk of crustal rock (using breeding so you can use the 238U and 232Th) then said rock releases fission energy equal to the combustion energy of 20x its mass in coal. So with breeders we can in effect treat the entire Earth's crust as something an order of magnitude more energy rich than coal.

(Whether breeders are practical or competitive is another matter, but then fusion looks pretty challenged in that respect also.)

[acidburnNSA]

This shocking factlet is repeated, verified, and credited to you in the writeup in my sibling comment.

[pfdietz]

So you did, thanks! BTW, the Earth becomes uninhabitable in about 1 billion years, not 4.

[ncmncm]

We could get there even quicker with a little effort.

[bsagdiyev]

Yea the efforts of people like you pushing anti-nuclear views. Can't wait for the greenhouse gases to make warming even worse while we use NAT gas and coal to smooth over wind and solar.