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U.S. Department of Agriculture (USDA) Secretary Sonny Perdue and Governor Mark Gordon visit an open-pit coal mine, in the…![Coal plant emission icon vector air pollution campaign in flat graphic]()
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Massive machinery at work in the open-pit Wyodak coal mine in the coal-rich Powder River Basin outside Gillette, Wyoming.…![Petites Constructions Wagons by Imagerie Pellerin. Original from Library of Congress. Digitally enhanced by rawpixel.]()
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