God this is so stupid.......
Ok, I did a quick search so shoot me. Don't get me wrong, this site is pretty anti-drug, but their references are all listed so there you go.....and you don't know shit about my "spirit" man. That extra crap you said to me was really unnecessary.
http://www.whitehousedrugpolicy.gov/...sht/marijuana/
Other Effects on the Body
Because marijuana contains irritants and carcinogens, it can promote cancer of the lungs and other parts of the respiratory tract. A study comparing 173 cancer patients and 176 healthy individuals produced strong evidence that smoking marijuana increased the likelihood of developing cancer of the head or neck. The more marijuana that was smoked, the greater the increase in likelihood. Marijuana also produces high levels of an enzyme that converts some hydrocarbons into their carcinogenic form. These levels may accelerate the changes that ultimately produce malignant cells. Additionally, marijuana users typically inhale more deeply and hold their breath longer than tobacco smokers, increasing the lungs' exposure to carcinogenic smoke.
Users who smoke marijuana regularly may experience the same respiratory problems as tobacco smokers, including daily cough and phlegm, symptoms of chronic bronchitis, and frequent chest colds. Continued marijuana use can result in abnormal functioning of lung tissue injured or destroyed by marijuana smoke.
Within a few minutes after smoking marijuana, the user's heart begins to beat more rapidly and may increase by 20 to 50 beats per minute, or even double. Results of a study released in 2001 indicate that a person's risk of heart attack within the first hour of smoking marijuana is four times the usual risk.
Long-term (cumulative, potentially permanent effects of chronic abuse)
-Can lead to addiction.
-Increases risk of chronic cough, bronchitis, and emphysema.
-Increases risk of cancer of the head, neck, and lungs.