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1. We need to start colonizing the Moon and Mars. As it stands now we have all of our eggs in one basket. If a rogue asteroid were to strike, if nuclear war would break out, or if a super pathogen would emerge we could lose all of the progress that we have made in the last 1000 years or even worse, go extinct. I
Originally posted by SG-17
2. Thorium Nuclear Reactors. Thorium is much more abundant on the Earth (and on the Moon) than Uranium and it is so much safer. Thorium melts at a very low temperature and a reactor would not need a water coolant, it melts at a low enough temperature that it would cool itself by convection. We currently have enough Thorium already mined to power the entire Earth for decades. We aren't using Thorium right now because coal companies would lose too much profits, and the lobbyists in Washington can't have that.