Energy Supply And Use16

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The United States is responsible for 20 percent of worldwide energy consumption, and 86 percent of the domestic energy supply comes from combustion of fossil fuels. The CO2 emitted by these activities constitutes a significant portion of total U.S. GHG emissions. Considerable research has focused on the role of the energy sector in emissions of GHGs and on the development of technologies and strategies that could result in increased energy efficiency as well as energy sources that release fewer or no GHGs. Another potential strategy for reducing energy-related emissions—and a key research topic—capturing CO2 during or after combustion and sequestering it from the atmo

16 For additional discussion and references, see Chapter 14 in Part II of the report.

sphere. A small amount of research has also focused on the implications of deployment of energy technologies on human and environmental systems.

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