And how do you know there has not been an increase in underage marijuana consumption? Where are you getting this "Fact" from, and how do you know it's true? Do they take a poll of the underaged tokers or something?
If tou make something more freely available I find it unlikely that teen usage will go down or remain the same. How would their be a reverse correlation?
I relied upon Colorado Department of Public Health survey results published on their official website on 7 August 2014.
“Preliminary results from the 2013 Healthy Kids Colorado Survey show the percentage of students who perceived a moderate or great risk from marijuana use declined from 58 percent in 2011 to 54 percent in 2013.”
Here’s the link: https://www.colorado.gov/pacific/cdphe/news/news-new-survey-documents-youth-marijuana-use-need-prevention
Medical marijuana was legalized in Colorado in 2011. Drug warriors said legalization would increase use by juveniles. The survey data indicate that the drug warriors were wrong. I can only hypothesize about the underlying cause for that fact. Maybe Colorado does a good job in educating kids on the risks inherent to using marijuana and tobacco since tobacco usage is also down. Maybe weed has lost its appeal as a forbidden fruit. In any case, the fact is that legalization has not caused an increase in underage use of marijuana in Colorado. In fact, the opposite has occurred.