and are they reusing poison-coverings en masse as we do?

Try to rub those two brain cells together and rethink that question.

enjoy your co2 dosage of the day
and the lost brain function as a resultant and indisputable consequences of said poison intake

You breathe co2 every second of every day.

I had to sort samples on dry ice (solid co2) for a week while wearing a mask and still had no effects.

Just Google "doctor runs 25 miles wearing 10 masks".

You have to be a special kind of idiot to think a mask, reused or not, will cause problems with your co2 intake.

I will never workout with a mask on but when shopping or where need I'll wear