atmosphere or troposphere
No, the m50 mask is not the most effective in confined spaces where there is not enough oxygen in the air to breathe to support life.
No, the only planet you can breathe on is Earth ^-^
Air does not come out of your eyes when you breathe, or at least it is not supposed to. Air shouldn't come out of your eyes when you breathe. Air should only come out of your mouth and nose when you breathe.
The air pressure at high altitudes is lower, which means there are fewer oxygen molecules in each breath. This can result in difficulty breathing because the body is not receiving enough oxygen to function properly.
Air: 78% nitrogen, 21% oxygen, 1% other. We breathe oxygen and other molecules.
The air molecules spreds out in space so there is not enough air to breathe for us there
They breathe air with lungs.
They do breathe air.
You may mean 'suffocation', -this is when a breathing animal is denied enough air to breathe effectively.
There is enough air inside to last you an hour or two comfortably.
enough to breathe, live etc a cage works best lol