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Hydroponic gardens.

1. Mars-men will grow plants for food.

2. The plants consume carbon dioxide and give off oxygen.

3. We will eat the plants and breathe in the oxygen, breathing out CO2 and pooping.

4. The poop feeds the plants.

Goto 1.

It's just exactly like the biological life cycle on Earth, except in miniature. It will work just as well on the Moon.

Problems: We'll need more water in our habitats that we can afford to carry. That's why scientists are so excited about the discovery of water ice on the Moon and on Mars.

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16y ago

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