Scientists Disagree On Cancer Risk From Herbicide Roundup

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In this June 2011, file photo, bottles of Roundup herbicide are displayed on a store shelf in St. Louis. (Jeff Roberson/AP)

Scientists are having a hard time agreeing whether glyphosate, the most commonly used weed killer in the United States, can cause cancer. The chemical is known by the brand name Roundup.

Reporter Grant Gerlock (@ggerlock) from Here & Now contributor Harvest Public Media explains why scientists disagree about the health risk posed by the herbicide.

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