Originally Posted by Libertine

Like I already said, there are many studies, which often contradict each other. Like I also said, the prevailing view is that marijuana is not directly linked to lung cancer.

Here's an abstract of a paper by the same Tashkin whose research the article you linked to was based on:

http://www.ncbi.nlm.nih.gov/pubmed/16128224



And here's a piece linking marijuana use to testicular cancer:
http://www3.interscience.wiley.com/j...TRY=1&SRETRY=0

Or another study linking marijuana use to cancer:
http://www.ncbi.nlm.nih.gov/pubmed/9726006

Basically, at this point in time, there's no consensus on the exact long-term effects of habitual marijuana use. However, studies done so far indicate that smoking marijuana isn't exactly healthy, even if the risks associated with it appear to be fairly limited.

But I'm done with this thread. To anyone without a strong personal interest in the matter, it should be clear that smoking pot in moderation is neither healthy nor extremely unhealthy.