The supply of uranium needed for nuclear power is not actually unlimited, renewable or sustainable  The projected lifespan of uranium must be compared to that of oil, gas and coal which are irrefutably running out. Uranium supply is expected to last for over 200 years, which could be extended to 30,000 with modern technologies. There has not been sufficient research undertaken to explore new potential sites, new forms or ways of prolonging the life of that which we already have access to. For example, it has been claimed recently that there are potential alternatives to uranium which could be used in the nuclear process: "There is also almost always thorium, a lightly radioactive metal, in the same ores, and it has to be disposed of." This disposal would create the same amount of energy as nuclear fission. The USA and Australia have potentially very big mines for rare earths and they are going to be producing Thorium as a waste product anyway, what better way to dispose of it than by creating energy?1  1Tim Worstall, You Don't Bring a Praseodymium Knife to a Gunfight, Foreign Policy, 29/9/10, See also: