Books in Category: Environmental Issues
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The Nation's River: A report on the Potomac
United States. Department of the Interior
663 downloads
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Millions from Waste
Frederick Arthur Ambrose Talbot
661 downloads
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The Unexploited West
Ernest J. Chambers
657 downloads
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Aspects of nature, in different lands and different climates (Vol. 2 of 2)
Alexander von Humboldt
656 downloads
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Crater Lake National Park, Oregon (1938)
United States. National Park Service
648 downloads
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The ivory king : A popular history of the elephant and its allies
Charles Frederick Holder
647 downloads
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Hygiene: a manual of personal and public health (New Edition)
Sir Arthur Newsholme
646 downloads
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Ragnarok : the Age of Fire and Gravel
Ignatius Donnelly
646 downloads
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African Nature Notes and Reminiscences
Frederick Courteney Selous
643 downloads
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Flowers of the Southwest Deserts
Natt N. Dodge
643 downloads
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Fishing Grounds of the Gulf of Maine
Walter H. Rich
642 downloads
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Guatemala, the country of the future
Charles M. Pepper
641 downloads
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American Big Game in Its Haunts: The Book of the Boone and Crockett Club
637 downloads
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A year at the shore
Philip Henry Gosse
636 downloads
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Modern Geography
Marion I. Newbigin
631 downloads
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The Taleef Shereef; Or, Indian Materia Medica
628 downloads
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Climatic Changes: Their Nature and Causes
Ellsworth Huntington and Stephen Sargent Visher
628 downloads
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The Natural History of Selborne, Vol. 1
Gilbert White
625 downloads
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Agate Fossil Beds National Monument, Nebraska
United States. National Park Service
624 downloads
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In Beaver World
Enos A. Mills
622 downloads
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Histoire d'un ruisseau (French)
Elisée Reclus
616 downloads
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A Review of the Resources and Industries of the State of Washington, 1909
Ithamar M. Howell
616 downloads
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The Beauties of Nature, and the Wonders of the World We Live In
Sir John Lubbock
612 downloads
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Deserts: Geology and Resources
A. S. Walker
611 downloads
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Weather proverbs
H. H. C. Dunwoody
610 downloads