Marijuana

Slang - weed, pot, grass, reefer, ganja, Mary Jane, blunt, joint, roach, nail

Get the facts.

 Marijuana affects the brain. THC (the active ingredient in marijuana) affects the nerve cells
 in the part of the brain where memories are formed.

 Marijuana affects your self-control. Marijuana can seriously affect your sense of time
 and your coordination, impacting things like driving. In 2002, nearly 120,000 people were admitted
 to emergency rooms suffering from marijuana related problems, an increase of more than 139
 percent since 1995.

 Marijuana affects your lungs. There are more than 400 known chemicals in marijuana. A  single joint contains four times as much cancer-causing tar as a filtered cigarette.

 Marijuana affects other aspects of your health. Marijuana can affect your body's
 ability to fight off infection. Long-term marijuana use can even increase the risk of developing
 certain mental illnesses.