By: Robert L Dorman
256 pages, no illustrations
Explores the careers and ideas of four figures of monumental importance in the history of American conservation - George Perkins Marsh, Henry David Thoreau, John Muir, and John Wesley Powell. Contains lively portraits of each of these early environmental advocates, who witnessed firsthand the impact of economic expansion and industrial revolution on fragile landscapes from the forests of New England to the mountains of the West.
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