Regarding: [RGB] Fortunately, there isn't that much Uranium on the planet, and we're burning it at a furious rate. We could conceivably deplete the currently known reserves in a matter of decades; it is NOT a long term solution to the problem of fossil fuel use.
rgb Isn't there a scheme for creating fissionable material from more common stuff (hafnium?) by bombarding it with neutrons excited out of their nuclei by laster pulses? So one might make bombs without U235? (See e.g. http://en.wikipedia.org/wiki/Hafnium#Applications) Peter P.S. Geothermal is a long term solution, maybe; see http://geothermal.inel.gov/publications/future_of_geothermal_energy.pdf but I'm still hoping for practicable fusion.
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