[en] Narrating Nature, Wildlife Conservation and Maasai Ways of Knowing University of Arizona Press
[en] The Big Burn · Teddy Roosevelt and the Fire That Saved America Mariner Books
[en] Of Green Stuff Woven Light Messages Publishing
[en] Diet for a Changing Climate, Food for Thought Twenty-First Century Books (Tm)
[en] Geoengineering Earth's Climate Twenty-First Century Books (Tm)
[nl] A fine and bitter snow New York : St. Martin's Minotaur, 2002.
[en] The Man Who Built the Sierra Club, A Life of David Brower Columbia University Press
[en] Forest Ecosystems Johns Hopkins University Press
[fr] Cueillette sauvage Mango
[en] The Last Unicorn Little Brown and Company
[en] You Can Save the Earth Hatherleigh Press
[en] Blue Revolution · Unmaking America's Water Crisis Beacon Press
[en] The Lomborg Deception · Setting the Record Straight About Global Warming Yale University Press
[en] Trash Talk Orca Book Publishers
[en] Down to Earth · How Kids Help Feed the World Orca Book Publishers
[en] 50 Ways to Help Save the Bees The Countryman Press
[en] American Serengeti · The Last Big Animals of the Great Plains University Press of Kansas
[en] Ground Truth: A Guide to Tracking Climate Change at Home University of Chicago Press