Osmotic power. It apparently offers a whole bunch of benefits. It captures the energy created during osmosis. Perhaps an energy source for the future?
On November 24th, Norway’s Crown Princess Mette-Marit officially opened the world’s first osmotic power plant at the seaside town of Tofte, near Oslo. Osmotic power generation is one of the lesser known renewable energy sources, but advocates claim it has a global potential of 1,600 to 1,700 TWh – equal to China’s total electricity consumption in 2002.
The energy is based on the natural phenomenon of osmosis: the movement of water through a semi-permeable membrane. Plants use osmosis to absorb moisture through their leaves. When fresh water meets salt water--for instance, where a river runs into the sea--enormous amounts of energy are released. This energy can be utilized to generate power through osmosis.
Link:
http://www.energyboom.com/emerging/world%E2%80%99s-first-osmotic-power-plant-opens-norway