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Innovative or insane? Cutting-edge green concepts hit the market

October 14, 2010 |  9:54 am

If the green geniuses of the clean-tech world have their way, you won't have to be a Jetson to drive around in a car running on fuel produced from thin air. Soon, you could be eating dinner using utensils made from algae as the lights overhead shine using power beamed down from space. Gee-whiz ideas -- and the investments that fund them -- are coming fast and furious, Tiffany Hsu writes.