High on the highway -- stoned-driving on the increase

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Getting behind the wheel after cannabis use is on the rise in the US, and THC, not alcohol, is now the most commonly detected intoxicant in US drivers. Detecting levels of THC, however, is challenging and the methods used so far cannot accurately determine a person's level of impairment.

from Plants & Animals News -- ScienceDaily https://ift.tt/2z5sYpH
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