Captain, I think you're both irresponsible and annoying. For one thing, you never even attempt to argue using your own words and thoughts. And you're putting a whole lot of stock in that 30-year-old Tashkin study, which is certainly not the only one that's been done. But the most insulting thing, besides the fact that you seem more than anything to simply want to take up vast amounts of thread room with your long, copied blocks of text, is that you're denying the actual first-hand experience of people here. If you'd listen and read what others have said, including me, you'll see that people have indeed reported smokers' coughs, aggravated ashtma and other pulmonary irritation as a result of smoking weed. My husband is a cardio-pulmonary physician, and he's seen countless cases of folks with similar problems, and not only among cigarette smokers. You discount what other studies have revealed and what living, breathing, real-life experienced people, including practicing physicians, have encountered. I think you're doing others a disservice by not accepting that not all experiences are as positive as that study you keep citing.