alt Hacker NewsThis is extremely wrong: CO2 impairment kicks in around 1000 ppm[1] possibly lower.
You can hit this breathing by yourself in an unventilated 3x3m room (literally measured in my house).
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teravor • today at 12:17 AM
there is some ambiguity here. submariners are exposed to really high co2 levels and are doing fine. it's possible that regular high co2 is just a proxy for bad air, and that you can acclimate to purely high co2 pretty well.
i have felt bad in high co2 environments before but i have never been in a controlled high co2 environment.
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You hit it even easier when driving in a car with the internal circulation turned on to keep nasty fumes out.