Teen Use of Marijuana Decreased Since Passage of Arizona Medical-Pot Law, Study Shows

People who thought teens would be using marijuana more because of Arizona’s 2010 medical-pot law are wrong, a new study shows. Combined, the percentage of 8th, 10th and 12th graders who reported using marijuana at least once in their lives went from 29.9% before the law passed to 28.7% in 2012.