One in three Americans have detectable levels of toxic weedkiller, study finds

Human exposure to 2,4-D has substantially risen despite a multitude of health and environmental concerns

One in three people across America have detectable levels of a toxic herbicide linked to cancers, birth defects and hormonal imbalances, a major nationwide survey has found.

Human exposure to the herbicide 2,4-D has substantially risen amid expanding use among farmers despite a multitude of health and environmental concerns, according to the first nationally representative study evaluating the footprint of the chemical.