Sat 10 Dec 2016 00:00:00 GMTResearch shows that more than one-third of teenagers smoke marijuana at least monthly. These teens put themselves at risk for a variety of medical, social, psychological, and legal problems, at a time when their bodies and brains are still developing. Even short-term marijuana use has been linked to memory gaps and difficulty solving problems. Because marijuana affects judgment and reaction time, young people who use marijuana run a greater risk of getting involved in dangerous situations including road accidents. In addition, of course, marijuana is illegal and is distributed by networks of often violent criminals. Marijuana use is a crime that can destroy a young person's future.