That is the sad part, isn't it? The world's largest perpetual motion/free energy attempt. That aside, I don't even want to begin to do calculations on what would be needed to have a real effect. It might be about as feasible as building a Dyson sphere.
Originally Posted by CR94
That scheme impresses me as a complicated perpetual-motion machine, which might be useful to manufacture fuel from carbon dioxide only if powered by a source of low-cost carbon-free electric power.