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Ah but the currents do change. They would have to on something that would allow them to turn with the current. Then again, you would have to watch out for all the environmetalists who would never allow you to put something down there that might injure a fish. Also I don't know if you've ever worked with anything in the sea, but crap grows on EVERYTHING underwater. Look at the ships that need to get the barnacles scrapped off every couple of years. We have a sea water system, that we need to chain flail the pipes every couple of months. Just not economically feasible. The maintainence costs would drive the price of that cheap electricity trough the roof.
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If ignorance is bliss, then wipe this smile off my face!
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