Power generation: In a nuclear power plant the company does not have to "make" the isotopes. In a solar power farm the company does not have to "make" the sun. In a coal/diesel power plant the company does not have to "make" the fossil fuel. In a hydroelectric damn the company does not have to "move" the water. In a UPDRAFT tower the company does not have to "make" the wind. In SWET's DOWNDRAFT tower... the company has to "make" the wind AND "move" the water. Simplest way to explain how this will not work.