Moderate smoking of marijuana does not lead to lung damage according to research by the American Medical Association

Survey among marijuana smokers the American Medical Association began in March 1985 and lasted 20 years concludes that moderate smoking marijuana does not lead to lung damage. The survey was conducted among 5,151 men and women from four U.S. cities. Moreover - the study also found that among smokers and tobacco, even Observed improvement. As has included more than 5,000 people and has covered a long period of time, the authors say that the study should help to clear some of the confusion about the risks of marijuana use, which has become increasingly common in the United States. However, the association warns that it is difficult to determine the risks of heavy marijuana use.