"There is a side of cannabis use that is not advertised or promoted, a physically and psychiatrically detrimental side, which might be darker than most of us realize. The ever-increasing use of cannabis across the United States is least partially due to its legalization. Evidence of the impact of cannabis on mental health should raise more concerns among mental health professionals, legislators, and the public; we are facing a serious and growing problem that requires efforts similar to those developed during the antitobacco campaign of recent decades. As both legalization of cannabis and a rise of illegal cannabis production continues, physicians need to be aware of the potential harms of cannabis on both physical and mental health. Without a true and comprehensive understanding of the deleterious impact of cannabis use, we will not be able to effectively educate our patients, the public, and policy makers to mitigate the risks associated with use. This volume collects information related to the risk of cannabis use on the human body from authors from different corners of the world"--