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Hybrid Cars Now, Fuel Cell Cars Later

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Science  13 Aug 2004:
Vol. 305, Issue 5686, pp. 974-976
DOI: 10.1126/science.1093965

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We compare the energy efficiency of hybrid and fuel cell vehicles as well as conventional internal combustion engines. Our analysis indicates that fuel cell vehicles using hydrogen from fossil fuels offer no significant energy efficiency advantage over hybrid vehicles operating in an urban drive cycle. We conclude that priority should be placed on hybrid vehicles by industry and government.

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