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
Just compare the volume between mouth and mask to your lung volume. To trap enough air to have any impact on your oxygen levels, the mask would have to look like a baloon nearly as big as your chest, when you exhale.
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