Marijuana laws have shifted dramatically over the past decade. What federal authorities still classify as illegal is now legal for medical use in 33 states plus Washington, D.C., and recreationally ...

A Republican-backed proposal would penalize Arizona cannabis users whose smoke or odor drifts onto neighboring property, drawing sharp opposition from civil liberties and marijuana reform advocates.

Smoking weed poses cancer risks beyond the lungs. Here’s what to know. Heavy marijuana use may come with a two- to eight-fold higher risk of head and neck cancer. Inhaling smoke of any kind exposes ...