I don't see why it has to matter if oil is finite or man is having an impact on the global climate, in order to choose to streamline our behavior.
Don't believe in peak oil? Fine, but urban air quality is still impacted by the fuels we choose to burn.
Don't believe in global warming? Fine, but using less fuel is still cheaper.
Even if you're an oil sheik who profits from high oil prices and you just don't give a hoot about air quality, a more aeroefficient car will still be quieter and offer better road manners and performance at speed.
No matter what your
belief happens to be on any controversial subject, it is very literally evil, foolish, and embarrassing to oppose positive change.