Teens: Pretty Sober, Except For The Marijuana And Vaping

The number of teens abusing drugs is lower than it's been since the 1990s, according to a national survey.

"In particular, we see a tremendous decline in the portion of young people using cigarettes," Dr. Lloyd Johnson, a study researcher at the University of Michigan, said at a press conference on Thursday. "The changes we're seeing are very large and very important."

But there are a couple of key exceptions. "[One] is marijuana. It hasn't gone up, like in older populations, but it hasn't gone down, and it remains worrisome," Volkow says. "Another concern is we see very high and very fast uptake of electronic vaping devices."