This is one of those areas where nuclear power might be useful. The main expensive input to this process is energy. If you had several nuclear power plants powe

This is one of those areas where nuclear power might be useful. The main expensive input to this process is energy. If you had several nuclear power plants powering this process, you could remove a substantial amount of CO2 from the air. Additional energy input could be used to create hydrocarbons, and you could have a carbon neutral fuel that is ultimately nuclear powered.