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Science 18 July 2003:
Vol. 301. no. 5631, pp. 315 - 316
DOI: 10.1126/science.1084294

Policy Forum

ENVIRONMENTAL SCIENCE:
Rethinking Hydrogen Cars

David W. Keith and Alexander E. Farrell

There are three credible reasons for switching to hydrogen cars: reducing air pollution, reducing CO2 emissions, and reducing oil consumption. Widespread deployment of hydrogen cars could support all three objectives--but, at least for the next quarter-century, in each case there are other options that could achieve these ends faster and far more cost-effectively.


D. W. Keith is in the Department of Engineering and Public Policy, Carnegie Mellon University, Pittsburgh PA, 15213-3890, USA. E-mail: keith{at}cmu.edu A. E. Farrell is with the Energy and Resources Group, University of California, Berkeley, CA 94720-3050, USA. E-mail: afarrell{at}socrates.berkeley.edu

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R. B. Jackson and W. H. Schlesinger (2004)
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