I don't think anyone would disagree with that!
My point, is that we are talking about 15% of the greenhouse gas emitters. So even if all the cars suddenly vanished...we only have a 15% in reduction.
We have gone so far with this, we are well past the point of diminished returns.
I am not trying to be argumentative, it's just that we (the consumer) end up with vehicles which are more expensive, less reliable, have lower fuel economy, need more repair over their life cycle, and generally won't last as long.
Take for example, DPFs on a diesel...., EGR on a diesel, both reduce economy and shorten the life of the engine, and choke horsepower.
With GDI we are producing more PM and will end up with a similar filter to a DPF.
With gasoline we can go into lean burn of something like 20:1 but NOx would be through the roof. My point is that there needs to be a balance of fuel economy and emissions.
They will always push for lower emissions, but people done realize that means lower fuel economy.
I'm for energy independence, foreign energy should not be relied of.