The marijuana debate

Associated Press
Jake Dimmock, co-owner of the Northwest Patient Resource Center medical marijuana dispensary, works on balancing the pH level of the soil used to grow new medical marijuana plants, Wednesday, Nov. 7, 2012, in Seattle. After voters weighed in on election day, Colorado and Washington became the first states to allow legal pot for recreational use, but they are likely to face resistance from federal regulations. (AP Photo/Ted S. Warren)

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Pot smokers formally gained the right to light up in Colorado on Dec. 10 as Governor John Hickenlooper signed into effect a controversial ballot measure legalizing marijuana for adult recreational use in what proponents hailed as a "historic day."

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