Atmosphere of Earth

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The atmosphere of Earth is the layer of gas around the Earth that is held in place by gravity. The atmosphere of Earth consists of mainly nitrogen and oxygen gas.

Constituents

Dry air (ignoring water vapor) consists of:

These numbers are consistent when the water vapor is removed from the air. The amount of water vapor varies considerably depending on the weather, but it averages around 1%.

Air with 1% water vapor (the average) consists of:

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