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Argon and trace gases like neon, helium, and methane make up less than 1 percent of Earth's atmosphere.
Yes, there is more carbon dioxide in the Earth's atmosphere than argon. Carbon dioxide makes up about 0.04% of the atmosphere, while argon makes up about 0.93%.
Nitrogen
Nitrogen makes up 78% of the Earth's atmosphere. Oxygen makes up about 21%.
Nitrogen makes up about 78% of the Earth's atmosphere.