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
33%
5%
11%
50%
18
flagGreece
40%
6%
13%
40%
15
flagAustria
40%
0%
26%
33%
15
flagthe United States
31%
20%
15%
32%
64
flagthe Philippines
30%
20%
20%
30%
10
flagIndia
44%
10%
14%
29%
137
flagNigeria
50%
0%
17%
28%
28
flagPoland
50%
3%
18%
26%
4278
flagthe United Kingdom
48%
10%
15%
25%
39
flagPakistan
33%
16%
16%
25%
12
flagGermany
40%
10%
27%
17%
90