Chemically, marijuana and tobacco smoke are quite similar, aside from their psychoactive ingredients: both arise from the combustion of leafy material, which produces a host of noxious gases and solid particulates, or tars, that are known to be hazardous to respiratory health.

Dating back to the British Indian Hemp Drugs Commission a century ago, observers have noted a high rate of bronchitis and other respiratory diseases among chronic ganja smokers in India, Jamaica and elsewhere;3 however, interpretation of the data has been clouded by the subjects' high rate of tobacco use, making it impossible to determine whether cannabis itself was responsible. This issue has been resolved thanks to modern clinical research by Dr. Donald Tashkin at UCLA, who has followed separate cohorts of marijuana-only, tobacco-only, marijuana-and-tobacco, and non-smoking subjects. Dr. Tashkin's work indicates that heavy daily marijuana smokers are more susceptible than non-marijuana smokers to respiratory disorders such as coughing, bronchitis, impaired lung immune function, and potentially precancerous cell changes.4
Vaping/oral injestion is the way to go...if your going to get high or take medicine daily..... might as well do it as healthy as possible.

The argument being legalization for medical reasons...why absorb weed/ medicine in a unhealthy manner........Vape ON!!!:vap_rasta: