NextGen America was started by the environmentalist of what nationality?
Tom Steyer Thomas Fahr Steyer (born June 27, 1957) is an American hedge fund manager, philanthropist, environmentalist, liberal activist, and fundraiser.
Gaylord Nelson Gaylord Anton Nelson (June 4, 1916July 3, 2005) was an American politician and environmentalist from Wisconsin who served as a United States Senator and governor. A Democrat, he was the founder of Earth Day, which launched a new wave of environmental activism.