So we are turning the CO2 back into (expensive) fuel, which can be burnt again and the CO2 released? But you're in luck, thanks to global warming the thawing permafrost and the warming oceans will release large quantities of methane (see https://en.wikipedia.org/wiki/Arctic_methane_emissions), which is an excellent fuel, and a much more potent greenhouse gas than CO2, so burning it would actually be good for the climate. Good luck with capturing it, however...