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A BAR code attached to a marijuana plant at a grow house in Denver, Colo., will allow it to be tracked through the growing and distribution process.

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UN: Colo., Wash. legal pot violates drug treaties

DENVER — A United Nations-based drug agency urged the United States government on Tuesday to challenge the legalization of marijuana for recreational use in Colorado and Washington, saying the state laws violate international drug treaties.

March 5, 2013 12:23 p.m. read more..


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