Comment Re:There must be a very good reason... (Score 1) 579
Yes, it has to be fresh. Sea water is at sea level, which does not do any good for generating power. This is a good thing. Sea water kills plants and animals when it displaces fresh water Sea water is also much harder on equipment due to corrosion. Trying to build a contained sea water storage unit would cost a stupid amount of money due to lack of land, depth of water off the coast, and soil/rock types.