Can you give me a kind of gas that is science?

Question

Ps..anwser it how it smells, sound,feels and looks like.

Not kind of gas like helium, oxygen, carbon dioxide, and hydrogen. Anwsers best wins!

Answer 1

When you pass wind, you are expelling the gas methane, which is a by-product produced by the bacteria in your digestive system as they break down the foods that you eat.

Its smells and sounds are probably familiar to you ;)