What can you do on the moon? You can't even breathe on the moon.
watch, i’ll destroy your problem in one fell swoop:
Ozzo - Grass Type Pokemon
Discovered deep within a lush rain forest, Ozzo have the uncanny ability to take in CO2, process it, and emit massive amounts of oxygen at rapid rates, much faster than anything man made. Having an Ozzo in your home is like a natural air freshener!
Ozzo, this pokemon i just made up, can keep oxygen in it’s body at a hyper dense rate and emit it at whatever pace it likes.
Imagine how much oxygen is in a space ship, right?
Multiply that by 10. That’s how much oxygen an Ozzo can keep in it’s body at any given point. That’d give anyone up in space plenty of time to start some sort of self-sustaining colony.
here’s a mockup of ozzo.
easy. done. never question me again.