An example of this, the people who work fly-in-fly-out in the mining industry in Australia are routinely tested for drugs and alcohol, so if you've smoked pot u

An example of this, the people who work fly-in-fly-out in the mining industry in Australia are routinely tested for drugs and alcohol, so if you've smoked pot up to three weeks before you could lose your job. But, there's rampant amphetamine abuse in the industry among workers, because that metabolizes in a matter of hours-days as opposed to weeks. So the anti drug policy that bans workers from using cannabis on their time off has had the inverse effect of increasing harder substance abuse. https://www.smh.com.au/business/companies/ice-the-drug-of-choice-for-miners-20150423-1mr8zp.html https://www.smh.com.au/business/companies/ice-the-drug-of-ch...