Question

Explain why aircraft traveling at very high altitudes (atmospheric pressure
decreases with altitude) must have pressurized cabins.

Answer 1

Answer:

so lower pressure of O2 could be dangerous as lower atmospheric pressure makes a lower pressure gradient between the body and environment, making it difficult to breathe.

Explanation:

Answer 2

the higher you move up the less oxogen is there, decreasing very fast can have negitive affects on the human body, that is also why your ears pop. this is why they must have pressurised cabins so the people on the aircraft aren’t negatively impacted whilst in the air