Well, ups and downs to the whole thing IMO. How much pollution does the actual production process for new vehicles produce? Im sure its a lot more than a car that has only produced emissions since say, oh, the mid 80's. If everyone drove an old car, even ones with shit mileage, we would probably still have less polution. How much more pollution is there when factories are churning out cars to people that buy new ones every three years? You have the accumulated emissions from their previous cars PLUS whatever it takes to produce their new ones.

As for the ups, when you have people like me, I have a 2002 GT with 140k on it. I still owe 6k. Im so upside down its not even funny. I was going to trade it in not that long ago and the dealership was going to give me $1500 for it. This program might benefit me for a short time period until I can start making enough money to go out and buy the $1000 fox mustang that I want to drive with all the parts I need to make it run and look good. Some way though someone will take an idea that seems good and then bastardize it beyond recognition of what the original idea might have been.