Marijuana breathalyzers are coming, but will they work?
https://newatlas.com/health-wellbeing/marijuana-breathalyzers-blood-breath-thc-levels-law-driving/Study finds stronger marijuana doesn’t lead to higher levels of intoxication
https://newatlas.com/health-wellbeing/high-thc-marijuana-concentrate-intoxication-blood-study/Tetrahydrocannabinol - Wikipedia
https://en.wikipedia.org/wiki/Tetrahydrocannabinol