This is why you fart all the time

Whether you find farting funny, disgusting or like to pretend you never do it, it's a bodily function we all perform. It is also known as passing wind among other, less polite names, on average we produce half a liter of fart gas a day. If everything is ticking along nicely, this fart gas is spread out over fourteen daily farts. But admit it, there are times when it seems as if you are exceeding this daily average. Why is this?