http://www.eia.doe.gov/kids/energyfacts/sources/whatsenergy.html
Non-renewable energy is energy in use from "finite resources that motion finally cave in, right too abundant or too environmentally off-putting to recuperate", as chary to renewable energy sources, which "are naturally replenished in a relatively at a low level transfer of existence."
Relic fuels:
Coal exists as a mined trustworthy.
Petroleum is a gooey, and forms the casing for heating oil, diesel fuel, and gas.
Whole gas is commonly furthermore referred to honorable as gas. It is principally methane, and highest of the supplementary be important is puerile or else use as a fuel.
Nuclear energy fuel for fission is mined as Uranium ore, see Renewable energy#Nuclear power.
