Timjoebillybob
Grandmaster
- Feb 27, 2009
- 9,567
- 149
From that link to this one:
But Kirkey told us masks don't hurt you.
Not defending Kirk, but that study doesn't really mean all that much. They tested the air inside the mask, that air is only a very small amount of what a person would breath in. And yes it will have a higher ppm of CO2, it's holding your exhaled air. If they had tested arterial blood gas that would be telling. Cup your hands in front of your nose and mouth but without touching, when you exhale and for a short time after at least under calm conditions the air between your face and hands will contain a higher ppm of CO2 compared to the ambient air.