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%
46%
8%
4%
9825
flagGreece
26%
46%
6%
20%
15
flagNigeria
40%
45%
5%
8%
35
flagAustralia
37%
43%
5%
13%
67
flagPakistan
42%
41%
3%
10%
56
flagUnknown
43%
40%
8%
8%
37
flagthe United Arab Emirates
40%
40%
10%
10%
10
flagthe United Kingdom
42%
37%
8%
10%
186
flagGermany
51%
37%
2%
8%
70
flagthe United States
41%
36%
9%
11%
548
flagthe Netherlands
66%
33%
0%
0%
15
flagIndia
46%
31%
11%
10%
502
flagIndonesia
70%
30%
0%
0%
10
flagRepublic of Ireland
50%
30%
0%
20%
10
flagCanada
54%
25%
8%
11%
35
flagMalaysia
53%
23%
11%
11%
26
flagthe Philippines
42%
22%
3%
25%
54
flagAustria
66%
20%
13%
0%
15
flagSingapore
75%
15%
5%
5%
20