Osmosis is an energy intensive water purifying technique that most of us are familiar with. It is a last resort of sorts for water filtration, to be used only when the impurities that must be removed escape all other filter systems. Here is an article about the use of osmosis to generate power:
The sun shone through the windows, the bass rumbled through the speakers and Crown Princess Mette-Marit enjoyed the world’s first cup of tea made using osmotic power. The opening of the world’s first osmotic power plant was a blast.
