An increasing number of studies is showing the hazards that may be associated with using marijuana. Dr. Christian Hopfer, a Colorado psychiatrist leading a national study on the drug says smoking marijuana a few times a day causes memory loss. The American Lung Association reports marijuana smoke has many of the same toxins and cancer-causing agents as tobacco smoke. The Highway Loss Data Institute says there are nearly three times the number of car accidents in states where marijuana is legal. Additionally, a 2015 Yale School of Medicine study found that marijuana use makes a person two-and-a-half times more likely to abuse prescription opioids.
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