Addressing the Link Between Marijuana and Mental Illness.

A recent study linking heavy marijuana use to schizophrenia raises concerns about the safety of legalizing recreational marijuana. While the study does not establish a specific cause-and-effect process, it does show a statistical correlation between heavy cannabis use and subsequent schizophrenia diagnosis. Skepticism is warranted when it comes to claims that marijuana is harmless, as its connection to serious mental health problems has been reported and studied for over 100 years. The human toll of addiction and self-destruction is now visible in many US cities.