Going green has taken on a new meaning in the U.S. Thirty states plus the District of Columbia now allow legal use of medical marijuana. Eight of those states, along with D.C., also have legalized recreational use of marijuana. The numbers in both categories could be higher in the not-too-distant future.
Two states appear to be on course to legalize recreational marijuana in 2018. Another state could also join the ranks of those allowing legal use of medical marijuana. Here's what you need to know.