What is the third by volume, after nitrogen and oxygen, component of dry air?

carbon dioxide
methane
ozone
argon
Argon makes up 0.934% of the earth's atmosphere. It is more than twice as abundant as water vapor and 23 times as abundant as carbon dioxide.
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Answers by country

carbon dioxide
methane
ozone
argon
answers
flagAustralia
25%
6%
12%
56%
16
flagGreece
35%
7%
14%
42%
14
flagIndia
45%
10%
13%
29%
105
flagthe United States
33%
20%
16%
29%
48
flagthe United Kingdom
48%
11%
11%
29%
27
flagPoland
51%
3%
18%
25%
3958
flagGermany
27%
13%
34%
20%
44