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Mean Clean Machines

Getting around doesn't have to pollute the atmosphere. Here are some better ways to go

The car, at least as we know it, is on the way out. New types of fuel and construction materials are on the horizon, and the look and feel of autos are on the brink of a radical redesign. Driving promises to become more environmentally friendly, stylish and fun. We may not be whizzing around in flying cars like the Jetsons or speeding vertically toward the sky on magnetic tracks as in Minority Report, but we will definitely be traveling in ways previously unimagined.

And we won't just ride in cars--a top U.S. inventor has transformed the lowly scooter into...

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