What is the main gas in the earth's atmosphere?

1 Answer
Phillip E.
Jun 9, 2017

The main gas in the atmosphere is Nitrogen.

Explanation:

The Earth's atmosphere is about 78% Nitrogen which is the main gas.
Oxygen makes up most of the rest at 21%.
The third most abundant gas is Argon at 0.9%.
The remaining atmosphere consists of small quantities of Carbon Dioxide, water vapour and other gasses.

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