Liquified natural gas might have a ghost of a chance maybe, but that isn’t “zero emission.” Actually electric isn’t either, unless it all came from nukes and hydro (and then what about the poor three-eyed fishies?).
California/Fornicalia seems to be on a permanent supply of 4 way windowpane now. If nobody blinks, this will result in the withdrawal of all car sales from California, and oodles of them in border states.
Been a long time, took me a minute to click there. ;)