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%
8%
8%
58%
12
flagGreece
18%
9%
18%
54%
11
flagIndia
42%
11%
11%
32%
84
flagthe United Kingdom
45%
12%
12%
29%
24
flagthe United States
35%
21%
14%
28%
42
flagPoland
51%
3%
18%
25%
3784
flagGermany
19%
19%
38%
19%
31