I have an idea that might support our life on other planets such as mars or mabey even the Moon. My idea Make a cycle that repeats its self. You have to make a dome and then plant trees in the dome After awhile you won't need oxygen due to the face that the trees are making oxygen. You would need to have some type of animal life that can convert the oxygen into carbon dioxide again. Some flaws in the plan that I can see is that you would need to be able to wait a long time and have enough Oxygen to have life and to make Carbondixoide. Also this process would take a long time And a lot of work. Another thing that I see that could be a Problem Is the fact that you would need to have some sort of water. You would need hydrogen and oxygen. Its is said on mars that they have found ice on the planet so this idea could still work.
If this were to work each dome so to say would have its own living ecosystem.
Please Reply and say any more flaws in this idea