Smoking isn't the only way teens are using cannabis. According to a study published Friday in the medical journal JAMA Network Open, they are also vaping it or using edibles.
Critics of drug-possession prosecutions often argue that they unfairly target people of color. Seattle, where recreational use of marijuana was legalized in 2012, is doing something about it.
On the same day the Justice Department signaled a possible federal crackdown on marijuana use, lawmakers in Vermont passed a bill that would legalize the drug for recreational purposes.