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A woman passes a joint at a pro-marijuana "4/20" celebration in front of the state capitol building April 20, 2010 in Denver, Colorado. Colorado, one of 14 states to allow use of medical marijuana, has experienced an explosion in marijuana dispensaries, trade shows and related businesses in the last year as marijuana use has become more mainstream.
Yesterday, Colorado Gov. John Hickenlooper signed a set of bills into law that will regulate the legal production, distribution and taxation of marijuana in the state. Last year voters approved a constitutional amendment allow adults to possess and grow small amounts of marijuana.
Colorado Public Radio's Ben Markus fills us in on how the state plans to control the legal use of pot.