One of the consequences of the terrible earthquake and tsunami in Japan on 11March was，of course，a leak of radiation at the Fukushima nuclear power station on the country's east coast．Soon afterwards，all the people living within twenty kilometres of the plant were told to leave because of the danger from the radiation．
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The pros and cons of nuclear power always come up in debates about how the world should produce the energy it needs．Those who think the risks are too great can obviously use Chernobyl-and now Fukushima-in their argument，while also pointing out that nuclear waste stays radioactive for hundreds of years，and asking what might happen if terrorists ever chose to attack a nuclear power plant．Those who support nuclear power point out that a very small amount of nuclear fuel can create a huge amount of energy，and that unlike the burning of fossil fuels such as oil，coal and natural gas，nuclear power stations don't contribute to global warming by pushing greenhouse gases into the atmosphere．
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Most of the world's energy currently comes from fossil fuels，but this can't go on forever．As well as the problem of global warming there is the simple fact that the Earth has a limited amount of these resources．They will eventually run out-although there is a lot of disagreement about when that might be．
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Apart from nuclear power