Decriminalize marijuana? Four ways America's views of pot are changing

As polls show national opinion toward marijuana use steadily changing toward greater acceptance, laws are changing and ballot initiatives are coming before voters. 

4. Legal marijuana for recreational use

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    Mason Tvert (l.) and Brian Vicente, leaders of a campaign for legal marijuana, pose in their offices in Denver.
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Legalization measures have already qualified for the 2012 November ballot in Washington State and Colorado, and a similar measure in Oregon is likely to qualify. But California, which led the way with the failed Prop. 19, has no legalization measures pending, according to Paul Armentano, deputy director of NORML California.

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