Colorado's Legal Pot Is Potent, and a Little Dirty

March 23, 2015 1:00 PM

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MONDAY, March 23, 2015 (HealthDay News) -- New lab tests on Colorado's legal marijuana suggest that the state's weed supply is more potent than ever, and also a little dirty.

For over a year, Coloradans age 21 and up have been able to buy recreational marijuana from state-regulated dispensaries. As part of the experiment, several labs have been certified to monitor samples from the state's burgeoning pot industry.

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