Quote Originally Posted by purple View Post
Cigarette smoking and smoke emissions from the cars and industrial companies that is polluting the air should be blame I think.

It has been a known fact that people who live in urban areas like cities do suffer with the effects of smoke compare to people who lives in rural areas.
Exhaust fumes, emissions from factory chimneys and industrial waste do cause air pollution ... mainly - though not exclusively - in built-up areas ... most CERTAINLY ...! Cigarette smoke? Hardly!