transport the gas in liquid form to be injected underground or sold for industrial use.
Is it carbon credits II ? LOL
If we really want to sequester CO2 for longer terms than trees or other plants provide, we should follow the example of the many non-human (but earthly) life forms that do so. Start making limestone. Safe and stable over millennia. However recognize you can have too much of even that good thing. Prior to the man’s Industrial revolution saving the world by increasing CO2 release the animal kingdom’s limestone makers were progressively dropping it over millennia and were approach the level that kills off all photosynthesis dependent plant life. Thus causing the worst mass extinction ever, ending everything that evolved since well before Earth was 1 Billion years old. By CO2 levels over geologic history Man is very much still Gaia’s hero for the CO2 releasing Industrial Revolution preventing death from carbon starvation. Not a CO2 over releasing villain.