Legalizing marijuana is the only way to control the distribution of the plant. Besides the fact that upon legalizing it would be hard to supervise that no child or teenager gets access to the plant, it has many economical pros. The most important benefits are: the elimination of the black market, which will leave a lot of criminals "jobless", it will give police officers more time to investigate more violent crimes plus the federal budget will get it's gains from marijuana taxation and licencing...