I strongly disagree. What the comment points to is that reducing car pollution isn't so much a question of saying we all need to pitch in as one of saying that

I strongly disagree. What the comment points to is that reducing car pollution isn't so much a question of saying we all need to pitch in as one of saying that we need to identify the serious problems and promptly deal with them. It is the kind of thing that is absolutely essential to understand before you have any chance of proposing an effective solution. This is, for example, why it is common to have regular smog certifications required. And why those certifications do more to reduce smog than, say, telling everyone to drive 20% less would.