Ah, the old 'cars pollute the air too' argument!
The problem with that argument is that like smokers, auto-pollution has ALSO been under the microscope. Due to a myriad of new regulations over the past 30 years they are continuously held to a higher and higher standard for fuel economy, pollution, safety and life cycle recycling.
A modern car is now one of the most recycled things on earth, I do not have the actual percentage but basically everything other than the battery acid is now recycled. For all I know that is recycled too!
The average fuel economy, despite bad press with SUVs, has gone up dramatically -- without even mentioning the electric cars, hybrids, hydrogen cars, etc all on the horizon (or already here).
Safety standards in all aspects of the auto industry/manufacturing have gone up dramatically with cars being virtually 'safety obsolete' within a few short years due to ever increasing standards and safety performance.
And the difference in pollution out of a car tailpipe from the late 1970's until now (a human generation) has been shockingly reduced, from what I understand to a factor of 100 or (much) more, with the next generation of cars giving off so little pollution it is increasingly hard to even measure.
So yeah, smokers ARE just like autos, lots of rules with more rules every year and higher and higher consumer/government standards with each passing year.
Get used to it!
Claeren.