On the international space station for example. People are up there for a long long time, where does all the air come from? It's not like they do air deliveries every so often, so how do they keep breathing? Surely there isn't enough space on the space station to store enough air to last them for months.
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[quote][b]Posted by:[/b] DAS B00T x2 I bet they have like, tiny trees in the rooms, or something.[/quote] It's so obvious now! That's pretty clever.