The amount of electricity generated by nuclear power plants may increase in the next few decades, as this form of energy is one of the few that are proven, reliable, and relatively carbon dioxide free. A question often asked about nuclear power is how long its main resource, uranium, will last. In the face of a large expansion of nuclear power to deal with climate change considerations, we revisit the question of the adequacy of the uranium resource and show that there is adequate supply for at least the next century and probably more.

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