Might it not be possible to "harvest" carbon from sources on e.g. the moon [1], thereby requiring less effort to launch those resources into orbit? Feel free to

Might it not be possible to "harvest" carbon from sources on e.g. the moon [1], thereby requiring less effort to launch those resources into orbit? Feel free to point out if I'm talking (thinking) nonsense here... [1] https://en.wikipedia.org/wiki/Lunar_resources#Carbon_and_nitrogen https://en.wikipedia.org/wiki/Lunar_resources#Carbon_and_nit...