Health Dec 15

Watch 8:14
How safe is super-concentrated marijuana?

Now legal in eight states, there are unanswered questions about the impact of recreational marijuana on public health. To maximize potency, pot can be purified for maximum THC, its psychoactive ingredient. But a lack of research and restrictions on these…

Nation Nov 25

Marijuana is seen under a magnifier at the medical marijuana farmers market at the California Heritage Market in Los Angeles, California July 11, 2014. Photo by David McNew/REUTERS/File Photo
Watch 9:13
What’s next for marijuana legalization

On November 8, multiple states legalized the use of marijuana for either recreational or medicinal purposes -- thus marking a major shift in U.S. drug policy. William Brangham speaks with Taylor West of the National Cannabis Administration and Jonathan Hudak…

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