Can it be used here? Yes, of course, though you need to concentrate the CO2 in the atmosphere first. Is it useful? Almost certainly not, just don't burn the hy

Can it be used here? Yes, of course, though you need to concentrate the CO2 in the atmosphere first. Is it useful? Almost certainly not, just don't burn the hydrocarbons in the first place and use that nice concentrated source of carbon (and atmospheric O2), instead of burning oil and O2 to produce CO2, extracting the CO2 from the atmosphere, and then unburning it. Will someone do it here? Probably, SpaceX is saying that they will as a way to develop the technology and claim they're carbon neutral.