• Flying Squid@lemmy.world
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    6 months ago

    They don’t. They put a gas mask on the prisoner, which lets oxygen in, rather than putting them in an airtight chamber.

    • apex32@lemmy.world
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      6 months ago

      My understanding is that the problem with the gas mask is not oxygen, but rather it’s so small that CO2 builds up, so the prisoner feels that they are suffocating.