Why Kentucky farmers are quitting tobacco and turning to hemp A Farm Bill passed by Congress last year included an amendment granting states and universities the right to research hemp. Several states have since started research projects, but Kentucky is at the forefront, experimenting with creating a new industry around this plant. NewsHour’s Christopher Booker…

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Understanding effects of marijuana on teenage brain Scientists are still working to fully understand the effect of marijuana on the teenage brain. And with legalization weeks away, Tina Yazdani speaks to experts about what the latest research shows.

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