Why couldn’t we just use a bag and reuse the air we breathe when underwater

Question

I’ve always wondered this since I was a child, and I see people use bags to rebreathe the air they have in their lungs for panic attacks, which only increases my curiosity.

In: Biology

Answer 1

There’s a Darwin Award out there for a guy who tried to go to the bottom of a flooded quarry with a trash bag full of air. It’s an educational read.