Oxygen is sparse at high altitudes but flying in a plane couldn't be more comfortable. Where do planes get their oxygen? Sign Up For The TestTube Newsletter Here ▻▻▻▻ http://bit.ly/1myX...
========== Flying at 30,000 feet you're higher than Mount
Everest, a place where you need an oxygen tank to breath. So, why don’t you need one
flying from New York to LA? Trace here for DNews my frequently flying
friends. As you go up higher and higher, the air pressure gets lower. The ratio of oxygen
in the atmosphere stays the same, but because of the lower pressure, the oxygen molecules
are spread out. Thus, at over 18000 feet (5.5km), there is less than half the oxygen available
sea level. Once you're over 25,000 (7km), comfortingly called the "Death Zone," by National
Geographic, plants no longer take root, and most animals can't breathe. At Death Zone
heights, oxygen levels are less than one-third what they are at sea level. Flying over...