I think NASCAR should ban smoking-tire burnouts by the race winners. They're cliche. They're not interesting. And they gratuitously pollute. (Yes, I know the racing itself is gratuitous pollution, but there's no reasonable chance of banning that.)
Those clouds of tire smoke are foul. They are probably toxic, and there's just no reason to let them happen. Unless you tell me the fans love it, are too stupid to see it for what it is, and would never stand for ending it because it's just the sort of excitement that gets them out of their trailers and down to the track in the first place, in which case it's too late to save the planet so let's party while it burns out.
No, I don't really think a weekly burnout ban will make a difference to the planet, but I think the symbolism is important. If NASCAR is trying to go upmarket, all the way to the dead-center of the middle-class, it could take this opportunity to evince a little environmental goodwill and a bit of awareness about the world outside the racetrack. Fans accept change like sheep -just a bit of bleating and they all forget the whole thing.
I recognize there may be little correlation between NASCAR fans and Al Gore viewers, but little steps are better than none.