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Far-Out Green Gadgets

In a headlong rush to save the Earth, you might grab at anything that promises to help. The Net is littered with possibilities--some silly and some just ahead of their time.

Kajsa Linnarsson, PC World

People-Powered Music Player 11 of 12

Christian Karlsson of Norway scored an honorable mention in the Greener Gadgets competition with his concept for the RollOn mp3 player, a device that the user powers by rolling the charging wheel (shown above) in between two hands or on a flat surface such as a table. Karlsson says that he was inspired by old-fashioned dynamo-powered lights for bicycles.

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