04-26-2007, 11:03 PM
Senjuro is correct, it's the fuel that pollutes the enviroment, no matter what type of engine the car has. But one could always find ways of making the engine more fuel efficient and less polluting...or replace the entire engine itself. For example, I have an older car which I am working on. I have already had the engine rebored, updated most of the electronics and pollution control devices...all this to make the vehicle as clean as possible. (I love older cars!) Although, I believe that hybrids and fuel cells are the wave of the future.
