HOLLY SHIT BATMAN?!?! IM GOING TO STOP SMOKING POT NOW!!!!!
you retard, read the facts for yourself
The recent discovery of a cannabinoid receptor system in the human brain has revolutionized research on marijuana and cannabinoids, and definitively proven that marijuana use does not have a dependence or addiction liability ("Marijuana and the Human Brain," March 1995 High Times). Marijuana, it turns out, affects brain chemistry in a qualitatively different way than addictive drugs.
Now Herkenham and his associates have proven that marijuana has no direct effect on dopamine production in the striatum, and that most of the drug's effects occur in the relatively "new" (in evolutionary terms) region of the brain - the frontal cerebral cortex. There is now biological evidence that far from being the "gateway" to abusive drugs, marijuana is instead the other way to get high - the safe way.

all from this site read it yourself
http://www.marijuanalibrary.org/brain2.html

God i hope you are joking, if you are, like lip said, don't. If your not, like everyone else said DIE.