Environmental Engineering Reference
In-Depth Information
Sources of Energy Used
in the United States
Renewable
Energy
Solar Power 1%
Water Power 36%
Oil (Petroleum) 40%
Geothermal Energy 5%
Nuclear
Power 8%
Renewable
Energy 7%
Natural
Gas 23%
Coal 22%
Biofuels 53%
Wind Power 5%
Note: Figures are for the year 2007. No information is included for hydrogen fuel because it was not yet being used in large enough quantities.
Source: U.S. Energy Information Administration
or below the oceans. Once these resources are found, they can
be used to generate electricity. There is a problem with fossil
fuels, however. The world has only a limited supply of them.
Once they are used, they cannot be replaced with other fossil
fuels. They are being used up. Since the people of the world
rely heavily on coal, oil, and natural gas for their power, new
sources of power are needed.
Nuclear power is another common source of energy in the
world today. Most nuclear power comes from a radioactive
substance called uranium. A complicated process is used to
make energy from uranium.
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