• Question: Why do fart smell?

    Asked by Claudia-mantovani to Helen on 14 Nov 2016.
    • Photo: Helen Hanstock

      Helen Hanstock answered on 14 Nov 2016:

      Farts contain gases from the intestines (digestive system). They contain oxygen, carbon dioxide and nitrogen (all components of air, which do not have a smell) as well as some other gases such as methane and hydrogen. But the culprit for making them smells is sulphur – mostly hydrogen sulfide.

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