Among old-school gearheads, conventional wisdom is that gasoline is where the fun is, was and always will be (until the pumps run dry). Alternative-fuel automobiles -- hybrids, diesels, electrics and the like -- are dorky, cumbersome and slow. But a growing body of evidence suggests environmental consciousness doesn't have to mean boring. To wit: 10 cars -- funky, fun and each the fastest for its power source, from an American-built ethanol-fueled roadster that runs like the wind, to a three-seat urban buggy from France that runs on the wind.
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