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Weed Potency Hits 30-Year High

Study finds THC levels have doubled since 1983, raising mental health worries

By Rob Quinn,  Newser Staff

Posted Jun 12, 2008 8:11 AM CDT

(Newser) – Today's marijuana is the strongest crop since the heyday of Cheech and Chong, a new study finds. University researchers who analyzed seized samples dating back to the '70s found the level of active ingredient THC hit an average of 9.6% last year, up almost...   Read full story »

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