Still don't quite get it. Additional power sold to the grid means competition to the coal-burning power plants. Assuming the plant's only goal is profit, would they just produce less power and lose money? Or would they try to lower the prices, to possibly lose a little less money? And then, if the prices do drop, the demand may rise due to the drop, and could even lead to producing more power by the plant. So Google selling that electricity could yield to even higher carbon emissions. No?