Policy ForumEnvironmental Science

Rethinking Hydrogen Cars

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Science  18 Jul 2003:
Vol. 301, Issue 5631, pp. 315-316
DOI: 10.1126/science.1084294

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There are three credible reasons for switching to hydrogen cars: reducing air pollution, reducing COemissions, 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.

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