Is there anyone too skeptical to see how much pollution we cause by driving?

Seems like most people are in denial. Imagine a big city like Los Angelas or Chicago or New York and ALL of the drivers in each city driving around all day every day back and forth to work. Now imagine all of other 3 dozen Major metropolitan areas from Boston to Phildelphia, Seattle to San Diego, Miami to Pittsburg, St Louis, Minneapolis, Dallas, Phoeniz, San Francisco, the list goes on and on. Now imagine all of the commuters on the nation's interstate system and the truckers and think about how this cycle goes on day after day, 120,000,000 cars on the road burning gallon after gallon. Now tell me if you think we are not doing irreversable if not, live threatening harm to our future generations quality of life.