Hi,
A few years ago I remember reading (or possibly hearing) a story about an obese American man who was staying in a small bedroom. He had eaten a lot of greens and grain or whatever. Anyway there was also something else about it being cold so he had all the windows shut.
During the night he passed a huge amount of wind and died from gas poisoning.
So for this 'Urban Legend' to be true, he would have needed to have expelled a huge amount of wind. Also the room must have been small and the door closed.
What's human wind made off?
How much wind could an obese person make in say 12 hours?
How much air does a person use up in 12 hours?