This headline from the @LATimes isn't just blatantly false and misleading; it's also the result of

[BumRushDaShow]

47. However my point was

because methane is a simple molecule, you still need much more methane by volume (gas volume wise) for an application - BUT with butane or propane, you don't have miles of permeable pipeline as a delivery infrastructure, where leakage can and does happen along that route, and bleeds hydrocarbons into the atmosphere along the way. And out in the street, it takes a larger leak for the mercaptan to be detected to prompt someone to actually find the source, and fix the leak.

I.e., you have "individualized usage" with propane and butane where it's easier to "turn off the valve" when done, than trying to go into a street to the mains and crank a valve shut (although you can obviously turn it off in the house but there is still that pipeline going to the mains in the street).