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I think you must mean how much energy can nuclear power supply , not use, and it is in the world-where else? In the US there are about 100 nuclear reactors and they supply about 20 percent of the nation's electricity
It is widely used but not as much as hydrocarbons and hydroelectric. Japan has extensive nuclear facilities, Europe has many.
In the US, 19 percent of electricity. World-wide about 16 percent
Nuclear power accounts for 6.3% of world's total primary energy supply or 16% of world's total electricity production.
For electricity, about 16 percent
If you have a group of people together, start off by saying how much you approve of nuclear power, how much it benefits the earth, and how it should be expanded. This should provoke some discussion.
In 2007 it was about 2600 Terawatthours. See the link below for how this figure is arrived at for all countries with nuclear power
In the US, 19 percent of total electricity. In the world, about 16 percent
The world's power needs could be met with 7500 well placed reactors.
There are no nuclear generating plants in Colorado
Not much pollution unless there is a nuclear reaction.
Indiana has no nuclear power plants.