XxNyxheroxX wrote:Yes, I am very sure about that, my chemistry teacher told me that.
[quote="wikipedia"]Nitrogen, the main constituent of air, is the primary gas released during flatulence, along with carbon dioxide, which is present in higher quantities in those who drink carbonated beverages regularly. The lesser component gases methane and hydrogen are flammable, and so flatus containing adequate amounts of these can be ignited. However, not all humans produce flatus that contains methane. For example, in one study of the feces of nine adults, only five of the samples contained archaea capable of producing methane. Similar results are found in samples of gas obtained from within the rectum.
The gas released during a flatus event frequently has an unpleasant odor. For many years, this was thought to be due to skatole and indole, which are byproducts of the digestion of meat. However, gas chromatography testing in 1984 revealed that sulfur-containing compounds, such as methanethiol, hydrogen sulfide (rotten egg smell) and dimethyl sulfide, were also responsible for the smell.
The incidence of odoriferous compounds in flatulence emissions increases from herbivores, such as cattle, through omnivores to carnivorous species, such as cats.[citation needed] Such odor can also be caused by the presence of large numbers of microflora bacteria and/or the presence of feces in the rectum.
The major components of the flatus, which are odorless, by percentage are:
* Nitrogen: 20–90%
* Hydrogen: 0–50%
* Carbon dioxide: 10–30%
* Oxygen: 0–10%
* Methane: 0–10%
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as said, only some ppl's fart contain methane, not everyone