Cannabis and Driving Study Casts Doubt on Zero-Tolerance Limits for THC

Cannabis Culture
By Patrick Cain, Global NewsDec 14, 2019, 4:12 pm231 pts
People using a driving simulator showed no signs of impairment a day after they smoked cannabis, though they still tested positive for THC, its main psychoactive component, a recently-published paper says. The research has implications for laws and workplace rules that require no trace of THC, which Scott…

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