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by wahahah 1098 days ago
How do they get the CO2 out of the sub?
1 comments

(Which dumps the CO2 overboard, which is why the sub needs to constantly replenish the amount of oxygen in the air.)
Specifically (at least in the US) amine treatment using Monoethanolamine:

https://en.m.wikipedia.org/wiki/Amine_gas_treating