Question

why do mountaineers use oxygen masks at very high altitude. Give reason
please answer​

Answer 1

Mountaineers carry oxygen cylinders while going to high mountain peaks because altitude increases as they climb the mountain. The amount of oxygen decreases as the altitude increases. The reason for the decrease in the amount of oxygen gas is because trees are not found in high altitudes.

Answer 2

Answer:

Mountaineers use oxygen masks at very high altitude because the oxygen level in he atmosphere reduces as we go higher and higher