Marijuana is the most common illicit drug used in the United States by teens as well as adults. Marijuana refers to the dried leaves, flowers, stems, and seeds from the hemp plant, Cannabis sativa. The plant contains the mind-altering chemical delta-9-tetrahydrocannabinol (THC) and 400 other negative chemicals. Currently, there is a growing belief by youth that marijuana is a safe drug. This misperception is more than likely the result of present public discussions about medical marijuana and the public debate over the drug’s legal status. In addition, some teens youth and adults believe marijuana cannot be harmful because it is “natural.” Although, not everything ‘natural’ is good for you, especially certain natural plants—take tobacco or water hemlock, for example.