By Laura Perkins, MLS | July 9, 2015
Project Editor, ETR

Laws on the legalization of marijuana in the U.S. are changing rapidly. Since 1996, 23 states and Washington, D.C. have legalized the use of marijuana to treat some medical conditions. A number of states have decriminalized the possession of small amounts of marijuana. And now Colorado, Washington, Alaska and Oregon have legalized the recreational use of marijuana for adults over 21. The public health implications within this changing landscape are only just beginning to emerge.