I very much doubt submarines operate that high The ISS runs at 3000-6000ppm CO2.... | Hacker News

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shawabawa3 3 months ago | parent | context | favorite | on: The bottleneck might be the air in the room

I very much doubt submarines operate that high

The ISS runs at 3000-6000ppm CO2. over 7000 is dangerous

a3w 3 months ago [–]

over 7000 is dangerous[citation needed]

I found 3-11k as regular levels, with no impairment known of. So acclimatization can happen?

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