Masked Cops Raid Home of Terminally Ill Medical Marijuana Patient

[geologic]

18. Lung Cancer No:

Marijuana smoke was listed as a cancer agent in California in 2009.

However, a large 2006 study found no causative link to oral, laryngeal, pharyngeal, esophageal or lung cancer when adjusting for several confounders including cigarette smoking and alcohol use.

http://cebp.aacrjournals.org/content/15/10/1829

Dr. Donald Tashkin, professor of medicine at University of California, Los Angeles, is among the foremost researchers studying the effects of marijuana on the lungs. His 2006 study, one of the largest to look at marijuana use and lung and upper-airway cancers, found that the “association of these cancers with marijuana, even long-term or heavy use, is not strong and may be below practically detectable limits.”
A larger, longer-term study published in 2012 by a separate group of researchers showed that marijuana had no detrimental effect on lung function. Tashkin, who was not involved in the study, called it “well conducted” and said the results confirmed his own findings.

http://healthland.time.com/2012/06/14/10-reasons-to-revisit-marijuana-policy-now/slide/marijuana-doesnt-cause-lung-cancer-or-death/