Does pure methane have an odour like butane gas? My little cousins and I discuss things like this.
Pure methane has no odor. The odor is added to methane to make it detectable if there is a leak. It smells like an egg fart, sulphery, almost like faint skunk.
Methane smells like farts I think ...there is methane in flatulence!
I don't think it does. It is when it is combined with a sulfide gas that you get the stink or when it reacts with certain bacteria as within a septic system.
Methane is odorless. Sulfur dioxide is added by the gas company so it can by easily noticed in case of a leak.