Which gas is colorless and odorless?

ozone
methane
benzene
ammonia
Methane is the main component of natural gas piped into homes for domestic heating and cooking purposes. In order to assist in detecting leaks, a sulphur-like odorant is added the gas used by consumers.
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Answers by country

ozone
methane
benzene
ammonia
answers
flagRomania
30%
70%
0%
0%
10
flagPoland
39%
45%
8%
4%
9562
flagNigeria
42%
42%
6%
9%
33
flagGermany
47%
41%
1%
9%
53
flagPakistan
42%
40%
4%
12%
50
flagUnknown
43%
40%
8%
8%
37
flagthe United Arab Emirates
40%
40%
10%
10%
10
flagthe Netherlands
61%
38%
0%
0%
13
flagthe United States
41%
36%
9%
11%
547
flagthe United Kingdom
42%
36%
9%
10%
176
flagAustralia
43%
35%
5%
15%
57
flagIndia
45%
31%
11%
11%
480
flagIndonesia
70%
30%
0%
0%
10
flagAustria
54%
27%
18%
0%
11
flagCanada
54%
25%
8%
11%
35
flagMalaysia
53%
23%
11%
11%
26
flagthe Philippines
45%
21%
3%
23%
51
flagSingapore
75%
15%
5%
5%
20