This is hydrogen electrolysis and the Sabatier process. There have been attempts to do this, but difficulties continue to prevent it from being deployed at scal

This is hydrogen electrolysis and the Sabatier process. There have been attempts to do this, but difficulties continue to prevent it from being deployed at scale. Hydrogen electrolysis is less efficient and maintaining the electeolysis systems expensive. The Sabatier process (aka power to gas) requires hydrogen as an input so it shares all of the above. It also requires a source of carbon dioxide to fix into hydrocarbons. Usually this is only done opportunistically when industrial processes produce carbon dioxide as a byproduct. The carbon dioxide in the atmosphere is at too low a concentration to be useful. This could be delivered through biofuels but there's not much energy density in them. If they can actually deliver these systems at viable costs, great. But no one has accomplished this so far.