Proponents of marijuana legalization have advanced plenty of arguments in support of their drug of choice: marijuana is less dangerous than legal substances like cigarettes and alcohol; pot has legitimate medical uses; the money spent prosecuting marijuana offenses would be better used for more pressing public concerns. While 13 states permit the limited sale of marijuana for medical use, and polls show a steady increase in the number of Americans who favor legalization, federal law still bans the cultivation, sale or possession of marijuana. In fact, the feds still classify marijuana as a Schedule I drug, one that has no “currently accepted medical use” in the U.S.