Where will the astronauts get water?

How much water can they store in each life unit?

How much water can they use each day?

How will they make more oxygen?

Which other gas will be part of the life-unit's 'atmosphere'?

What will they eat when they first arrive?

Why is there soil on the top of their life units?

What else will they eat apart from plants?

How will they 'feed' their plants?

How many square meters of the life unit is available for plant growth?

Where will the CO2 come from needed for the plants to photosynthesis?

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