Re: Interesting justification.
> Also, the standards that "aren't being met" are close to impossible to meet
If true by some law of physics then all manufacturers will be equally affected. When the sorts of vehicles demanded by the population become unavailable, the standards would be relaxed.
I don't know enough about the engineering to comment on whether it is or isn't possible to hit the targets, but here is what I do know.
1. Cars are heavily judged by consumers on high power and low fuel consumption.
2. The combination of fuel, air and temperature that maximise the power and minimise fuel consumption are not so great when it comes to NOx.
Left to market forces alone, NOx reduction will be sacrificed to give better numbers that people actually care about. The problem of NOx is externalised. That is where regulation is required.