If adults want to take such chances (with marijuana) that is their business
Permanent brain damage is one of the inevitable results of the use of marijuana.
Marijuana is probably the most dangerous drug in America today.
Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves.
I now have absolute proof that smoking even one marijuana cigarette is equal in brain damage to being on Bikini Island during an H-bomb blast