~~Methane needs 5-16PPM [PDF] to be detectable with human smell. Atmospheric Methane is at about 2ppm. So the vast majority of people would not notice a difference. ~~

nvm see below

[–] isolatedscotch@discuss.tchncs.de 4 points 3 hours ago (1 children)

methane doesn't have an odor, you linked to the data sheet of trichlorofluoromethane, a completely different molecule

The gas in your house is artificially made stinky so that people would notice leaks and blow their house up, which happened a lot back when the stinky chemicals weren't added and it was odorless

[–] saigot@lemmy.ca 2 points 2 hours ago

That's what I get for moving quick, thank you. I guess the overall point that methane will not make the atmosphere smell still holds