Stockbyte/Stockbyte/Getty ImagesThe kids are all right... for the most part. And we know that in part thanks to the Youth Risk Behavior Surveillance System (YRBSS... not exactly a catchy acronym, to be honest). This CDC initiative has monitored adolescent health behavior changes over time since 1991 through a series of surveys given to high school students. We currently have about 32 years of data from more than 250,000 kids to date. We’ve known for some time that, overall, use of alcohol and cannabis is down considerably in this period (more on that in a minute). But recently researchers at D...

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