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KYWizard t1_j8e071c wrote

I think it is perfectly achievable....until it isn't. That is to say as soon as one tiny little thing throws off the delicate balance of a closed system, there is collapse.

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SandAndAlum t1_j8fkt80 wrote

I would have thought redundancy would be the way to go. Four or five different ecosystems which are isolated and produce enough of a surplus to export food and air for a year or two. Refugees can move into a quarantine zone while restoring their ecosystem.

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