Karl
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As point of fact, car 1 and car 2 could be using the same amount of gasoline per mile, or very close to it. A Corvette can get 26 MPG highway, a Cobalt will not get twice that amount (or anywhere close to twice -- actually it gets about 35). The difference in total emission is related to the amount of air that each engine is pumping through it... it appears that you don't understand your own argument:[...] In your example above, both cars end up emitting 50ppm (parts per million), but both use more gas than at 100ppm and car 1 uses twice as much gas as car two per mile [...]
The small engine produces, say, 1.9 liters of air per second with 50 ppm of pollutant.
The large engine produces, say, 5.7 liters of air per second with 50 ppm of pollutant.
5.7 liters of air is three times as much as 1.9 liters, so even though the ppm figure is the same, the larger engine has produced three times the total pollutant.
I thought that was your argument. In fact, I thought it wasn't all that bad; even though your conclusion was faulty