Dr. Duane Carr – Professor of Surgery at the University of Tennessee College of Medicine, said this: “Smoking does not discolor the lung.”

Dr. Victor Buhler, Pathologist at St. Joseph Hospital in Kansas City: “I have examined thousands of lungs both grossly and microscopically. I cannot tell you from exmining a lung whether or not its former host had smoked.”

Dr. Sheldon Sommers, Pathologist and Director of Laboratories at Lenox Hill Hospital, in New York: “…it is not possible grossly or microscopically, or in any other way known to me, to distinguish between the lung of a smoker or a nonsmoker. Blackening of lungs is from carbon particles, and smoking tobacco does not introduce carbon particles into the lung.”
http://cfrankdavis.wordpress.com/2012/08/06/the-black-lung-lie/

'Nearly 80% of people diagnosed with lung cancer now, in 2012, are non-smokers.'
http://lungcancer.about.com/b/2012/11/29/why-anti-smoking-campaigns-arent-enough-to-eliminate-lung-cancer-deaths.htm

Lungs taken from people who puffed a pack a day for more than 20 years safe for transplant.
http://vitals.nbcnews.com/_news/2013/01/29/16741714-lungs-from-pack-a-day-smokers-safe-for-transplant-study-finds?lite

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Related links:

'For more than forty years, hundreds of thousands of medical doctors have been deliberately lying to you.'
http://www.sott.net/article/226999-Smoking-Helps-Protect-Against-Lung-Cancer

'Nicotine - The Zombie Antidote'
http://www.sott.net/article/254745-Nicotine-The-Zombie-Antidote