| Rank | Author | Title | # Votes |
| 1 | Aldo Leopold | Sand County Almanac | 100 |
| 2 | Rachel Carson | Silent Spring | 81 |
| 3 | Lester Brown et al. | State of the World | 31 |
| 4 | Paul Ehrlich | The Population Bomb | 28 |
| 5 | Henry David Thoreau | Walden | 28 |
| 6 | Roderick Nash | Wilderness and the American Mind | 21 |
| 7 | E. F. Shumacher | Small Is Beautiful: Economics as if People Mattered | 21 |
| 8 | Edward Abbey | Desert Solitaire | 20 |
| 9 | Barry Commoner | The Closing Circle: Nature, Man, and Technology | 18 |
| 10 | Donella Meadows et al. | The Limits to Growth | 17 |
| 11 | Wendell Berry | The Unsettling of America: Culture and Agriculture | |
| 12 | George P. Marsh | Man and Nature | |
| 13 | John McPhee | Encounters with the Archruid | |
| 14 | William Thomas et al. | Man's Role in Changing the Face of the Earth | |
| 15 | Edward Abbey | The Monkey Wrench Gang | |
| 16 | World Resources Institute | World Resources | |
| 17 | Norman Myers, ed. | Gaia: An Atlas of Planet Mangement | |
| 18 | Amory Lovins | Soft Energy Paths | |
| 19 | World Commission on Env. and Development | Our Common Future | |
| 20 | Paul Ehrlich, Anne Ehrlich, and John Holdren | Ecoscience: Population, Resources, Environment | |
| 21 | Loren Eisley | The Immense Journey | |
| 22 | James Lovelock | Gaia: A New Look at Life on Earth | |
| 23 | G. Tyler Miller | Living in the Environment | |
| 24 | Eugene Odum | Fundamentals of Ecology | |
| 25 | Barbara Ward and Rene Dubos | Only One Earth: The Care and Maintenance of a Small Planet | |
| 26 | Herman Daly and John Cobb | For the Common Good | |
| 27 | Bill Devall and George Sessions | Deep Ecology: Living as if Nature Mattered | |
| 28 | Barry Lopez | Arctic Dreams | |
| 29 | Roger T. Peterson | A Field Guide to the Birds | |
| 30 | Marc Reisner | Cadillac Desert: The American West and Its Disappearing Water | |
| 31 | William Vogt | Road to Survival | |
| 32 | Ansel Adams and Nancy Newell | This is the American Earth | |
| 33 | Ernest Callenbach | Ecotopia | |
| 34 | Annie Dillard | Pilgrim at Tinker Creek | |
| 35 | Stephen Fox | John Muir and His Legacy: The American Conservation Movement | |
| 36 | Clarence Glacken | Traces on the Rhodian Shore: Nature and Culture in Western Thought from Ancient Times to the End of the 18th Century | |
| 37 | Ian McHarg | Design with Nature | |
| 38 | Bill McKibben | The End of Nature | |
| 39 | Garrett Hardin | Exploring New Ethics of Survival | |
| 40 | Donald Worster | Nature's Economy: A History of Ecological Ideas |