These plants seem to be self-sustaining (they even create extra energy) and can provide potable water from the oceans: http://cleantechnica.com/2015/03/15/firs

These plants seem to be self-sustaining (they even create extra energy) and can provide potable water from the oceans: http://cleantechnica.com/2015/03/15/first-kind-wave-energy-farm-largest-naval-base-australia/ http://cleantechnica.com/2015/03/15/first-kind-wave-energy-f...