Cannabis harm reduction strategies are simple enough for anyone to understand.
Most teens are using cannabis properly right now with very little training. In pot rallies all over the world, young people gather in groups numbering in the tens of thousands, while serious overdoses involving an ambulance trip to the hospital from these events can be counted on one or two hands.
The majority of people who took too much cannabis at the Vancouver cannabis farmer’s markets walked to the hospital under their own power. Compare that with an average weekend on a street with a strip of bars – the number of alcohol overdoses from these nights are significantly higher, and unlike the cannabis overdoses, the alcohol overdoses carry with them the risk of death.
The more people use cannabis, the less they drink – increases in cannabis use can be seen as alcohol harm-reduction.
http://gatton.uky.edu/faculty/sandford/391_f13/marijuana.pdf
https://news.liftcannabis.ca/2015/02/02/will-legal-marijuana-lead-to-decreased-alcohol-sales/