Pot Smoke And Mirrors: Vaporizer Pens Hide Marijuana Use

Odorless and discreet, vaporizer pens for pot are growing in popularity. But the devices are a nightmare for parents because they make it hard to know if kids are using marijuana.

Source: http://www.npr.org/blogs/health/2014/04/18/302992602/pot-smoke-and-mirrors-vaporizer-pens-hide-marijuana-use?ft=1&f=

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