"Marijuana should be removed from the criminal justice system and regulated in a manner similar to alcohol and tobacco. There are five jurisdictions in the United States that have rejected the prohibition of marijuana and changed their laws to legalize small amounts of marijuana: Colorado, Washington, Oregon, Alaska, and Washington, D.C. Four states will license and regulate production and sale of marijuana. Marijuana legalization won on the ballot in Colorado and Washington in the 2012 election, and in Alaska, Oregon and Washington, D.C., in the 2014 election."
http://www.drugpolicy.org/marijuana-legalization-and-regulation
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