Marijuana breathalyzers have been in development for years. The hope is that these tools will help to solve a major issue associated with legalizing cannabis: accurately measuring THC impairment in drivers.
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But a new study out of Australia suggests that current breathalyzers are nowhere near to achieving that goal.
Conducted by researchers at the University of Sydney, the study found that marijuana breathalyzers were inconsistent in measuring impairment from THC.
Researchers analyzed 28 studies on driving performance and concentrations of THC in blood and saliva. What they found was that the connection between the two factors was inconsistent.
The idea of cannabis breathalyzers is
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