Can you tell us what is the advantage of passing a regulation rather than taxing gasoline at higher rates? It would seem to me that regulation always has loop holes, and corporations will do only the very minimum to sneak by the regulation. Whereas taxing gasoline means that consumers would actively choose fuel efficient cars over poor efficiency cars, plus your big government would get lots of tax dollars. (Which it desperately needs) So, why are you and the other environmental groups always so gung ho for regulation but never mention or support increasing taxes on gasoline?