UNITED BY HISTORY: JOHN MUIR, GIFFORD PINCHOT, AND THEODORE ROOSEVELT
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FIGURE 1.20 With the writings of George Perkins Marsh serving as their inspiration, John Muir, Gifford Pinchot, and Theodore Roosevelt worked tirelessly throughout their lives to protect the natural heritage of the United States.
(Holt-Atherton Special Collections, University of the Pacific Library); (Grey Towers/US Forest Service); (Moffett Studio/Library of Congress)