…I BURP AND FART?

Everybody burps and farts around 2.5 litres of gas per day, which comes from the air we breathe, the drinks we quaff and the bacteria in our digestive system. Our bodies get rid of this excess gas via the mouth and anus. Unlike cows, methane is not a major constituent of our farts. So if someone sets a fart alight, it’s usually hydrogen gas that’s burning.