In conjunction with Red Ribbon Week, there will be a free screening of the "The Other Side of Cannabis," a documentary about the negative effects of marijuana on youth. The 60-minute film features interviews with Harvard researchers, neuroscientists, medical doctors, and families and teens affected by marijuana use. It is geared toward parents, students 12 and older, educators, medical and health professionals, and anyone working with youth. A question and answer period will follow the screening.