Free energy from ocean waves

Federal Energy Regulatory Commission has cleared 21 preliminary permits, and about 35 are pending for wave and tidal projects, largely off the West Coast and shores of Florida and New England.

Widespread use of marine energy is about a decade away, says Roger Bedard, ocean energy leader for the Electric Power Research Institute. In 50 years or so, he says, 20% of offshore wave energy could be tapped practically. That, combined with tidal energy, could constitute 10% of all U.S. power sources. usatoday/tech