The debate of evolutionary climate change vs. man's influence is far from clear, and far from over. It seems to me that only a fool would claim that man has NO impact on the global environment. Also, cleaning the environment is a good thing.

THAT being said, people put a deaf ear to FACTS such as : an older vehicle with only PCV for emission control, in good running order, will burn cleaner than a new vehicle with faulty emission controls. Or the FACT that older vehicles ( + 30 yrs ) are a minority of the 'population' and contribute less pollution ( as a percentage ) because they spend less time on the road, and are maintained better.

But I have one last FACT.. ya better be ready to either convert to an alternative fuel or park it. Especially if Al Gore gets his way.

Hey, I hear Mars is warming also, and that the sun has significantly increased sunspot activity, but I'm sure Al will figure out a way to blame us ( man ) for that as well.