There has been indepth studies done by MD. Taskins of UCLA, americas foremost lung expert when it come to marijuana smoke. While there are irritants in any smoke, cannabis smoke causes mild irritation to the large airways of the lungs. Symptoms completely disappear when smoking is dicontinued. However, unlike tobacco smoke, cannabis smoke does not cause any damage in the small airways of the lungs. This is the area where tobacco smoke cause long term and permanent damage to the lungs. A cannabis user may smoke 3-5 joints per day. A tobacco user may smoke 20-60 cigarettes per day. Tobacco tars contain radiation. Cannabis tars do not. It was in 1969 that Dr. Taskins was told by government studies that by the year 2000 the usa would literally see hundreds of thousands of cases of lung cancer showing up in clincis across america. Dr. Taskins science and research painted a different out come. To this day there have been no cases of lubg caccer documented to a person who uses(ed) cannabis only. Todays reasearch shows us that THC is good to destroy or greatly reduce the size of tumors. The Dr.s research, which still holds water today tells us there is no concern cannabis users should have when it comes to developing emphysema. Unlike tobacco users. His study concluded that if tobacco users were to quit smoking tobacco and replace it with cannabis that they would add 10-15 years on to their lives.

sources: National center for atmospheric reasearch; American Lung Association: U.S. Surgeon Generals Office;National Academy of Science;
UCLA;Harvard University;Crancer Study(funded 6 million usa dollars)

Take it easy Viperguy. Inhale truth and reasearch instead of decades of lies and propaganda and you too will have a healthier set of lungs.

dai*ma :thumbsup: