Chlorpyrifos is a pesticide that’s in wide use around the world; it’s legal in 49 US States, and its use was legal in Hawaii until a couple of weeks ago, when Hawaii became the first state in the nation to ban its use. Nicholas Comerford, dean of the University of Hawaiʻi at Mānoa College of Tropical Agriculture and Human Resources in our studio to tell us why.

Nicholas Comerford