Preventing the diversion of marijuana from states where it is legal under state law in some form to other states;

Preventing state-authorized marijuana activity from being used as a cover or pretext for the trafficking of other illegal drugs or other illegal activity;

Preventing violence and the use of firearms in the cultivation and distribution of marijuana;

Preventing drugged driving and the exacerbation of other adverse public health consequences associated with marijuana use;

Preventing the growing of marijuana on public lands and the attendant public safety and environmental dangers posed by marijuana production on public lands; and

Preventing marijuana possession or use on federal property.