Anyone who has played in the ocean surf or experienced the current of a river, felt the tug of outgoing or incoming surf, recognizes that there is energy contained in moving bodies of water. Harnessing that energy to create electricity has been in third position, behind solar and wind, as a source of alternative energy. But now, advances in technology are changing that situation. Commercially viable prototypes and active production models operating in wave farms are currently producing electricity successfully. The World Energy Council has described wave energy as a concentrated form of solar energy. With three quarters of the earth covered in water, wave power is an inexhaustible source of clean energy.