CNBC has the latest statistics on this risky behavior among teens:
Of eighth, 10th and 12th graders surveyed, 24 percent said they’ve used the drug in the past year, according to research from the University of Michigan. The 1.3 percent increase is the first significant rise in seven years.
The increase in teens using marijuana comes as more states legalize pot for medical and recreational use.
This year, 14.1 percent of high school seniors said they see “great risk” in smoking marijuana occasionally, down from 17.1 percent last year. Also, 64.7 percent said they disapprove of using the drug regularly, down from 68.5 percent last year.