The largest study of its kind has unexpectedly concluded that smoking marijuana regularly or even heavily, does not lead to lung cancer. The new findings surprisingly dismissed the researchers hypothese. Donald Tashkin of the University of California at Los Angeles, a pulmonologist who has studied marijuana and its effects for 30 year stated that, "We hypothesized that there would be a positive association between marijuana use and lung cancer, and that the association would be more positive with heavier use," he said. "What we found instead was no association at all, and even a suggestion of some protective effect." These findings are surprising to say the less.
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