U.S. Primary Energy Consumption by Source and Sector, 2007

Energy is consumed in the U.S. in four major areas: transportation, industrial, residential, and commercial, which is monitored by the Department of Energy. As populations grow, so does energy consumption — putting more and more pressure on the environment and hopefully adding more incentive to promote green information and technology (IT). Take a look at how the U.S. uses primary energy sources as a whole.

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Source:http://www.dummies.com/how-to/content/us-primary-energy-consumption-by-source-and-sector.html