Over the past few years, attention to the recycling of nuclear power spent fuel has grown. Fears of global warming due to fossil fuel burning have given nuclear energy a boost; over the next 15 years dozens of new power reactors are planned world-wide. To promote nuclear energy, the Bush administration is seeking to establish international spent nuclear fuel recycling centers that are supposed to reduce wastes, recycle uranium, and convert nuclear explosive materials, such as plutonium to less troublesome elements in advanced power reactors.