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St. Paul, Minn.

Trends in teen drug use

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Synthetic pot
This Feb. 15, 2010, photo shows a package of K2 which contains herbs and spices sprayed with a synthetic compound chemically similar to THC, the psychoactive ingredient in marijuana.
Kelley McCall/ASSOCIATED PRESS
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Synthetic pot
This Feb. 15, 2010, photo shows a package of K2 which contains herbs and spices sprayed with a synthetic compound chemically similar to THC, the psychoactive ingredient in marijuana.
Kelley McCall/ASSOCIATED PRESS