Really, then why are only 30% of lung cancers smoking related?
Emphysema is also virtually unheard of in non-smokers.
Not so, nearly everyone is born with it, but it doesn't manifest itself in everyone.
I didn't say smoking was not a risk factor for some health problems, I'm not stupid, my point is that tobacco DOES not CAUSE everything they say it does. Does it increase some risks? Yes. But correlation is not the same as causation.
I don't know what rumors on the internet you are talking about, because I am talking about research and medical knowlege. I don't happen to be at my own computer right now and so do not had files and links at my fingertips - but they are out there and have been posted here at FR time and time again.
I do not trust information coming from people that earn their living by receiving grants from Left-wing foundations seeking to destroy the hospitality industry and improve their own bottom line.
You misunderstand cause and effect. If you're struck by lightning, does the bolt kill you, or do you die of a heart attack? Both answers are actually correct. Smoking causes cancer. Period. End of story. If you need a recap of the history of that relationship being distinguished, here's a good one I found.
http://www.txtwriter.com/Onscience/Articles/smokingcancer2.html