For extra fun, CNG and LPG vehicles both exist in North America. Not too common, but they're both out there, usually in fleet operations. LPG is used for BBQs

For extra fun, CNG and LPG vehicles both exist in North America. Not too common, but they're both out there, usually in fleet operations. LPG is used for BBQs and some heating, so more widely available, but hard to find cars that use it.