How bad is smoking cannabis compared to smoking tobacco?
Smoking any drug is unhealthy. Cannabis is no exception. The smoke actually contains higher concentrations of carcinogenic polycyclic aromatic hydrocarbons (PAHs) than tobacco smoke. Cannabis smokers generally inhale more smoke for longer depositing more than 4 times as much tar on their lungs as cigarette smokers. To balance this, however, they smoke less joints and smoke less often.
