Question

We find it difficult to breathe when we climb mountains. Why?
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Answer 1

Answer:

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Step-by-step explanation:

At higher altitudes, there is less pressure because less air is pushing down from above. Less atmospheric pressure means that the density of the air is lower. ... Mountain climbers' bodies can adjust to high-altitude air in several ways, such as increasing the frequency of breathing and increasing blood flow.

Answer 2

: The amount of molecules in the air is much less at higher altitudes ( the air is thinner) This means that there is less pressure to push the air into the lungs and a lower percentage of Oxygen in the air. This makes it harder to breath