The production of radioactive wastes, such as spent (used) reactor fuel and other radioactive waste, is a significant environmental hazard associated with nuclear power. These substances may continue to be radioactive and hazardous to human health for tens of thousands of years.
The creation of electricity by nuclear reactions is known as nuclear power. Nuclear processes such as nuclear fission, nuclear decay, and nuclear fusion may all provide nuclear energy. Nuclear power plants currently generate the great majority of the world's electricity from nuclear energy through the fission of uranium and plutonium. Hazardous waste comes in the form of radioactive waste when radioactive material is present. Numerous operations, including nuclear research, nuclear energy production, rare-earth mining, and the reprocessing of nuclear weapons, produce radioactive waste.
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