Young Adults Left Behind by Marijuana Legalization in Colorado, Washington

Major 'legalization' players satisfied with age limit, dissenters say prohibition should have ended for all adults.

Marijuana smoke fills the University of Colorado in Boulder, Colo., April 20, 2010 during an annual rally.

Marijuana smoke fills the University of Colorado in Boulder, Colo., April 20, 2010, during an annual rally.

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