I’ve heard about how people need more oxygen when up in a mountain because of the air up there so thin. Also, the people who do live in the mountains and are more adapted to the air have bigger lungs.
When I learned that the oxygen around us is about 1/4 of the air around us I worried. I thought that we were running out of the air, well, I was wrong. Apparently, if a human being intakes 100% of oxygen that same human will cause not only lung damage but blindness. “Oxygen, you are perfect staying 20 – 21% in the air chart”.
– Your truly, L.O.A.S.H