Do you know why sometimes your fart smells bad, and sometimes it doesn't?
According to this video, large noise farts consist of higher portion of CO2, nitrogen, and hydrogen gas, which doesn't have any odor. But silent farts contains a sulfur gas which comes from bacteria which applied to digest food, and that is how the smells can be really bad. Check out this fun video attaced below!
Source : http://www.youtube.com/watch?v=btV4K9JMVEQ&list=UUC552Sd-3nyi_tk2BudLUzA
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