A typical **** is composed of about 59 percent nitrogen, 21 percent hydrogen, 9 percent carbon dioxide, 7 percent methane and 4 percent oxygen. Only about one percent of a **** contains hydrogen sulfide gas and mercaptans, which contain sulfur, and the sulfur is what makes farts stink.Jan 19, 2018
**** Facts: 13 Fascinating Truths About Passing Gas | Oddee