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Why is atmospheric pressure greater at low elevations and less at higher elevations?
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33 votes
Why is atmospheric pressure greater at low elevations and less at higher elevations?

User JackMorrissey
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23 votes
Earth's gravity pulls air as close to the surface as possible. As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.
User BlueIceDJ
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