WATER - Tidal Energy Could Be Next Big Wave

The U.S. Department of Energy has just unveiled a floating off-shore wind platform that it thinks could make a big splash. But it has already been working hard to commercialize ?tidal energy" that uses underwater turbines to create electricity, which must then be wired into the grid. SeaGen - world's first

http://www.forbes.com/sites/kensilverstein/2013/06/06/tidal-energy-cou