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Animatsyesterday at 11:10 PM0 repliesview on HN

Surprisingly, no. Humans adapt to higher CO2 concentrations over a period of days to weeks. Submarines run as high as 5000ppm, which is way above normal atmospheric concentration.[1] Many indoor environments are above 1000ppm.

This seems to be like high altitude adaptation. It's going back and forth between concentrations that causes problems at moderate concentrations. The adaptation doesn't happen.

[1] https://www.nationalacademies.org/read/11170/chapter/5#51