@Ivan_Ivanovich @teknomunk @EvilSandmich @PunishedD It's all chemistry, but the main input is energy. If energy is cheap enough, you can do just about anything. Using Haber-Bosch, you can pull nitrogen out of the sky (it's what allows all fertilizer and munitions production). Electrolysis can crack water into hydrogen and oxygen. Add in some carbon and you've got all the feedstocks needed for fuel. But electrolysis and HB-process for nitrogen requires a LOT of power, which can only be economically done on earth using nuclear power.

Co2 production though comes from literally every living being and every possible production system. It's all encompassing and impossible to regulate without a system that would make communism look hands-off in comparison. The plutocrats like to push it because it gives them carte-blanche to do anything they could possibly want, including forced population reduction.