It is a fact and not open to debate that Internal Combustion engines are responsible for huge amounts of ozone and other pollutants in our air. And just because there isn't a problem right where you are doesn't mean that your pollution doesn't bother someone else. There is a little place in MD called Davidsonville. The area is sparsely populated, has no industry and no other reasons to have bad air. The area is consistantly one of the worst in the nation and has many code red ozone days every year. Why? Because polluted air from many areas to the west of Davidisonville seems to settle there. The pollution comes from areas as far away as Ohio.
I'm not a champion for global warning or anything like that but I am concerned. If we can do something to help out a little without too much trouble to ourselves I don't see why we shouldn't.