Hydro works well here in Sweden: http://en.wikipedia.org/wiki/File:Electricity_production_in_...
Why isn't hydro used more? (2% of world production according to the post). Once built it will generate: * Alot of power, as opposed to wind/solar. * With zero emissions, as opposed to coal/oil. * That requires no storage of dangerous waste, as opposed to nuclear. Win, win, win.