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
40%
6%
13%
40%
15
flagAustria
30%
0%
30%
40%
10
flagthe United States
30%
20%
18%
30%
55
flagNigeria
53%
0%
15%
30%
13
flagIndia
45%
11%
14%
28%
127
flagPoland
50%
3%
18%
26%
4153
flagthe United Kingdom
51%
10%
13%
24%
37
flagGermany
31%
13%
28%
20%
60