Marijuana affects the brain. BIG NEWS. If it didn't, people wouldn't get high. - As Obama says, "That's the point!."

None of this shows marijuana harms the brain. -- In fact, the preponderance of the research shows marijuana prevents the deadly swelling from brain trauma, gives the brain more stamina, helps prevent Alzheimer's and similar brain disease, and actually stimulates the production of new brain cells.

This is just more junk science Reefer Madness, timed to try and affect the legalization votes in November.

The rabidly prohibitionist agency NIDA has been desperately funding research for decades, looking for some significant harm of marijuana to prop up the fraudulent prohibition. In all that time, they have not found even ONE. If they had, they, the DEA, the ONDCP, etc. would be shouting it from the roof tops and it would be on everyone's tongue. - Instead:

[Crickets chirping]

So, ironicallly, even NIDA has given marijuana a clean bill of health!