It would? How does that work then? It seems counterintuitive to me that collecting carbon from the atmosphere, at a density of 400 ppm and chemically bound to

It would? How does that work then? It seems counterintuitive to me that collecting carbon from the atmosphere, at a density of 400 ppm and chemically bound to oxygen, could possibly be economical compared to extracting pure unbound carbon from a big hole in the ground. We burn carbon for the energy. Where does the energy come from to un-burn it?