Thank You, 72 - Gaylord Nelson by Wisconsin Alumni Association published on 2020-04-02T18:48:35Z Thank you Polk County for Gaylord Nelson LLB’42. Known at the Father of Earth Day, Nelson championed the protection of our environment as Wisconsin’s governor, and later U.S. senator. As we celebrate the 50th anniversary of Earth Day, we learn more about the man who changed the way the world looked at planet Earth. Genre Learning