Americans are smoking more weed, but testing positive less often
The percentage of US workers testing positive for marijuana has fallen below 2%, according to an analysis released by American medical testing company Quest Diagnostics. The study, based on a scan of millions of patients tested as part of the company’s drug monitoring service, shows a marked decline in positive testing over the past 10 years—back in 2002, just under 3% of US workers tested positive for marijuana.
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