Does the U.S. Have a Marijuana Problem?

Does the U.S. Have a Marijuana Problem?

In a recent Opinion piece, NYT editorial board argues that America has a marijuana problem. In just over ten years, attitudes towards the drug have changed dramatically. Marijuana is now legal for medical use in 40 states, and for recreational use in 24 states. Margaret Haney is a neurobiology professor who researches the effects of marijuana on the brain. She joins the show to discuss.