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  Making energy while sparing dolphins

The blades of the first commercial tidal stream turbine, the 134-foot-tall SeaGen will spin about 12 times per minute-too slow to injure passing sea life- and churn out 1.2 megawatts, enough to power 1,000 horses. The first turbine should go online this month in the Strangford Narrows near the coast of Northern Ireland. seageneration.co.uk

Source: Popular Science Magazine, December 2007

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