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原文传递 Federal Energy and Fleet Management: Plug-In Vehicles Offer Potential Benefits, but High Costs and Limited Information Could Hinder Integration into the Federal Fleet.

题名：	Federal Energy and Fleet Management: Plug-In Vehicles Offer Potential Benefits, but High Costs and Limited Information Could Hinder Integration into the Federal Fleet.
关键词：	integration；information；management；offer；limited；fleet；feder；plug-ins；energy；tial
摘要：	The U.S. transportation sector relies almost exclusively on oil; as a result, it causes about a third of the nation's greenhouse gas emissions. Advanced technology vehicles powered by alternative fuels, such as electricity and ethanol, are one way to reduce oil consumption. The federal government set a goal for federal agencies to use plug-in hybrid electric vehicles--vehicles that run on both gasoline and batteries charged by connecting a plug into an electric power source--as they become available at a reasonable cost. This goal is on top of other requirements agencies must meet for conserving energy. In response to a request, GAO examined the (1) potential benefits of plug-ins, (2) factors affecting the availability of plug-ins, and (3) challenges to incorporating plug-ins into the federal fleet. GAO reviewed literature on plug-ins, federal legislation, and agency policies and interviewed federal officials, experts, and industry stakeholders, including auto and battery manufacturers. Increasing the use of plug-ins could result in environmental and other benefits, but realizing these benefits depends on several factors. Because plug-ins are powered at least in part by electricity, they could significantly reduce oil consumption and associated greenhouse gas emissions. For plug-ins to realize their full potential, electricity would need to be generated from lower-emission fuels such as nuclear and renewable energy rather than the fossil fuels--coal and natural gas--used most often to generate electricity today. However, new nuclear plants and renewable energy sources can be controversial and expensive.
报告类型：	科技报告