Giant hogweed sap has even caused blindness in people who got its sap in their eyes. This is one bad weed. This woody shrub is in the sumac family and like poison ivy, poison oak produces an oil ...

SEE ALSO: What you need to know about poison ivy None of science of DNA disruption was all that important to me as I followed John Kemp, the founder of The Giant Hogweed Mitigation Project ...