&gt; Oxygen doesn&#x27;t get used up... We would just need a way to extract the oxygen...<p>Is that literally all there is to it -- minus reasonable loss? Does something like that already exist?<p>&gt; i.e. some plants<p>Perfect! Do you think that plants can make up the loss from systems that we could set up for converting CO2 back to O2? When can fly some cows and chickens up there? Throwing plants and livestock on the Moon seems too good to be true.<p>Also, completely off topic, does anybody know the current value per acre of Moon?