PBS.org devoted to preserving our environment created millions of acres of forest preserves graduated Phi Betta Keppa from Harvard created millions of acres of forest preserves Roosevelt “seemed an unlikely naturalist,” PBS said. graduated Phi Betta Keppa from Harvard PBS: TR, the Movie & Online Biopic graduated Phi Betta Keppa from Harvard created millions of acres of forest preserves Roosevelt TR's Legacy - The Environment pbs.org graduated Phi Betta Keppa from Harvard