While long criticized over waste and environmental effects, nuclear energy is being embraced as a clean energy source by the ...

Kazakhstan, Canada and South Africa have the largest uranium reserves. Uranium is a non-renewable resource used to generate nuclear power. Uranium reserves are expected to last for another 80 years.

Non-renewable fossil fuels still make up most ... They generate large amounts of energy relatively cheaply. Small amounts of uranium produce lots of energy. Once up and running, it is cheap ...