Many have heard that "Marijuana is natural" or "It can't hurt you" or "It only stays in your system for thirty days". Is this really true? Marijuana is often claimed to be a safe drug, but our video presentation of an interactive Narconon program exposes the myths and shows kids the effects that this drug and others can have on their life. What are the real effects of Marijuana on your health? Hear the truth like you've never heard before! 28 min.