Quote:
Originally Posted by alltherage
1. Marijuana Causes Cancer
Many have said that smoking pot and smoking cigarettes is the same thing and, therefore; marijuana must cause cancer, as well. Not only have countlessindependentstudies disproved this, but some have actually found thatmarijuana decreased tumor growthby as much as 50%. (Sorry, cigarettes will still kill you.)
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Not at all disproved, contrary to what that site says. There haven't been any studies good enough to tell us one way or the other - partly because there are so few people who have smoked pot regularly without also having smoked tobacco, and partly because prevalent pot smoking is a more recent phenomenon and it takes many years for lung cancer to develop (the study the website quoted excluded anyone over 60, which pretty much invalidates it).
We know that there are several confirmed carcinogens in pot smoke, and exposure is likely actually higher than from tobacco smoke. There is very limited evidence that THC might mitigate some of this risk, but the jury is still out on that. Second-hand pot smoke is almost certainly carcinogenic.
I'm pretty neutral on recreational pot smoking (so long as they don't drive impaired or expose others to their smoke), but to say that any association with cancer has been "disproven" is a big stretch.