Here Comes Lunar Power

[BusinessWeek.com] A drama is unfolding in New York City’s East River. This summer the Popsicles at a Gristedes supermarket on Roosevelt Island, midstream between Manhattan and Queens, will be kept icy by power generated just a stone’s throw from the riverbank. Anchored 30 feet down, six underwater turbines will turn day and night, driven by the tidal flows in the channel. At a fish-friendly 35 rpm, the propellers will crank out up to 200 kilowatts of clean power, or roughly half the peak needs of the supermarket.
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