[Dylan16807]

When I see people talking about processes where the end goal is removing carbon from the atmosphere, it's generally two setups.

The first setup is growing a lot of plants, turning them to charcoal, and burying it. This does require lots of energy, but the plants do it for you. You don't have to input the energy.

The second setup is a process that uses CO2 but doesn't generate fuel, so it needs much less energy than creating hydrocarbons.