Why is it difficult to breathe on the high mountains?
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because mountains are too high and because of their height their we can't breathe because oxygen level is low on greater heights......
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The lower pressure makes it harder for the oxygen molecules to pass through the lung membranes. The oxygen molecules are less pressurized causing more empty space between them in the air we breathe. ... At high elevations, the air pressure is lower because there is less mass of air above compared to sea level
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