Cannabis Market is Plagued by Contaminants, Patchy Regulation, Uneven Potency

Cannabis is legal for recreational use in nearly half of all U.S. states. And, it’s an increasingly common substitute for beer or wine. Numerous scientific studies back up the assertion that cannabis is less harmful than alcohol in terms of physical harm, dependence, and social harm. But as a new series by NPR’s Brian Mann and Sydney Lupkin point out, safety is relative and highly dependent on where your weed is sourced. A trusted dispensary may be your best protection against contaminants.