Inject CO2 into basalt formations, and over the course of a year or so it will turn into rock. There are already several pilot programs doing this, and it's very scalable.
Other projects apply energy to turn the CO2 into liquid fuel. Of course that returns the CO2 to the atmosphere, but it'll be a long time before we electrify long-haul jets so it'd be great if their fuel were carbon-neutral.
Other projects apply energy to turn the CO2 into liquid fuel. Of course that returns the CO2 to the atmosphere, but it'll be a long time before we electrify long-haul jets so it'd be great if their fuel were carbon-neutral.