I’ve heard a lot of anti-maskers use the argument that since we breathe out CO2, it will become trapped in the mask and is dangerous to breathe back in.
Obviously, this isn’t the case, because doctors wear their masks for hours and hours on end while doing surgeries. However, I am wondering, how does it work?
In: Biology
As others have said, the CO2 is small enough to just leave the mask. What you’re actually breathing in is the moisture from your own breath and it is warm because the mask traps some of the heat that you breathe out. While it may feel uncomfortable to breathe in wet, warm air (it certainly does to me), it’s only as dangerous as breathing on a humid day.
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