Centers for Disease control and prevention. https://www.cdc.gov/marijuana/health-effects.htm
Smart approaches to marijuana: https://learnaboutsam.org/wp-content/uploads/2016/04/SAM-Long-Website-Kevin-Sabet.pdf
"THC (psycho active ingredient) potency of marijuana has grown 10-20 fold since the 70's"
Facts & Statistics about Marijuana
Consequences of Youth Marijuana Use
memory, learning, attention, decision making, coordination, emotions, and reaction time.
which can affect relationships and mood.
Above the Influence. Drug Facts: Marijuana. Retrieved 8/23/16 from http://abovetheinfluence.com/drugs/marijuana/#footnote_0_165