Marijuana use is at a 40-year high, and there are big changes in the usage of alcohol and hallucinogens.

While some changes on campus may last, other changes are expected to go up in smoke.

With marijuana legalization, a growing number of people are lighting up. That includes a growing number of college-age students. At Om of Medicine Cannabis Retailer, they're noticing that growth.

"Last year there weren't classes, it was all virtual. So this summer we did see an uptick," Jay Klotz, the GM of Om said.

That uptick is a reflection of the trends nationwide.

"Cannabis use is among the highest it's been in the past 40 years," John Schulenberg, U of M Psychology Professor, said.

Schulenberg is also the lead investigator for the University of Michigan's annual national monitoring the future study.

The study finds daily marijuana use – defined at use on 20 or more occasions in the past 30 days – rose 7.9% in 2020 among 19-22-year-old full-time college students.

Read the full article at WXYZ.