Why does a mountain climber need an oxygen supply at very high altitudes, even though the air still contains 21% oxygen

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asked Jul 1, 2018 183k views

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Vanpersil · Answer 1 · 2018-07-06T01:52:30+0000

Because the higher a mountain climber goes up the harder the air pressure the harder the air pressure the more oxygen it takes to fill your lungs.The more air pressure the harder it is to breath through your lung.

Hope i helped

Why does a mountain climber need an oxygen supply at very high altitudes, even though the air still contains 21% oxygen

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