Almost 99% of Earth's Atmosphere is made up in 2 gasses. What are the gasses and the percentages for each?

Explanation:

The table indicates that nitrogen and oxygen are the main components of the atmosphere by volume. Together these two gases make up approximately 99% of the dry atmosphere. Both of these gases have very important associations with life.

The Atmosphere has two main components: nitrogen(78%) and oxygen(21%). These make up 99% of the volume of "dry air". In this context "dry air" refers to all gases, except water vapour. Remember that even under the most humid conditions on Earth, water vapour is at most 2% of the atmosphere.

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