In an article for Wired, Uranium is So Last Century, Richard Martin touts the promise of thorium fueled nuclear fission. Unlike uranium, thorium is plentiful in nature and produces a “miniscule” amount of radioactive waste. It is also an effective breeder and lacks the weaponization potential of uranium. The technology is called LFTR — for Liquid Flouride Thorium Reactor — and seems to be fairly well understood. There is a blog called Energy from Thorium, by Kirk Sorensen, which keeps up with the latest news and has useful links and discussion.
LFTR in 16 minutes
Like Polywell fusion, the development of thorium reactors could be funded at a small fraction of the anticipated cost of cap and trade. If we are serious about the threat of carbon-induced warming, then we ought to explore serious energy alternatives.