Far-Out Green Gadgets

Not 'let's drag', but less drag

The Electrobike Pi is an electric bicycle with flywheel regeneration that feeds excess power back to recharge the battery instead of simply losing it to friction. It also has a great slogan: "Cooler wheels for a warmer planet." You can ride the Pi the way you would a traditional bike, or you can use its 36-volt pack of Lithium ion batteries to carry you along. To reduce the vehicle's carbon footprint from low to zero, you can attach a giant arch-shaped solar charger to it. After an 8-hour day in the sun (or after 2.5hrs plugged in to an electrical outlet), that battery is good for another 50 miles, even if you don't pedal at all. This sleek guilt-reliever will set you back only $US7500.

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