Is this weed breathalyzer for real? Don’t hold your breath.

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This post is part of our High-tech High series , which explores weed innovations, and our cultural relationship with cannabis, as legalization in several U.S. states, Canada, and Uruguay moves the market further out of the shadows . Will you soon be blowing into a tube connected to a handheld gadget that can tell an officer or an employer whether you’ve toked in the last few hours?

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