It is not so much as the composition that is important, it is that at higher altitudes there is less air. Air is about 20% oxygen, but the higher up you go in altitude, the thinner air will have less oxygen. That's what makes breathing more difficult at higher altitudes.
At high altitude, there is less oxygen, so breathing rate is increased to compensate.
Because of the high altitude.
There is danger to a healthy person from high altitude breathing because the oxygen level is very low which could possibly cause a heart attack or stroke.
Your breathing can become laboured due to your smaller lung capacity in high altitudes.
Increase in breathing and heart rate
yes, the higher the altitude the thinner the air, thus the less oxygen in the air.
Pilot because it is thin at high altitude in non pressurized cabin.
B/c the higher you go the less air there is to breathe from.
Because in the mountain range there have lack of oxygen for our breathing
the air is super thin cuz of the high altitude
it is difficult because many of the high mountain slopes are rocky and steep. the climate is cold. A lack of oxgen in the air at high elevations makes breathing difficult
The greenhouse effect is weak for low altitude clouds, so their albedo effect dominates and they cool the Earth's climate. In contrast, cold high altitude cirrus clouds may either cool or warm the climate.