Books in Category: Environmental Issues
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Auroræ: Their Characters and Spectra
J. Rand Capron
673 downloads
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Missions au Sahara, tome 1 : Sahara algérien (French)
E. F. Gautier
671 downloads
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Nature Mysticism
John Edward Mercer
666 downloads
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Cave Regions of the Ozarks and Black Hills
Luella Agnes Owen
664 downloads
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Millions from Waste
Frederick Arthur Ambrose Talbot
659 downloads
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Animals' Rights Considered in Relation to Social Progress
Henry S. Salt
659 downloads
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Mosaic of New Mexico's Scenery, Rocks, and History
654 downloads
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African Nature Notes and Reminiscences
Frederick Courteney Selous
653 downloads
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Cuba Past and Present
Richard Davey
653 downloads
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The Municipal and Sanitary Engineer's Handbook
H. Percy Boulnois
649 downloads
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The Nation's River: A report on the Potomac
United States. Department of the Interior
648 downloads
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Ragnarok : the Age of Fire and Gravel
Ignatius Donnelly
646 downloads
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The ivory king : A popular history of the elephant and its allies
Charles Frederick Holder
645 downloads
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Whale hunting with gun and camera
Roy Chapman Andrews
641 downloads
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The Healthy Life, Vol. V, Nos. 24-28
Various
640 downloads
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The Story of the Hills: A Book About Mountains for General Readers.
H. N. Hutchinson
637 downloads
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Climatic Changes: Their Nature and Causes
Ellsworth Huntington and Stephen Sargent Visher
635 downloads
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The dawn of astronomy
Sir Norman Lockyer
632 downloads
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The filtration of public water-supplies
Allen Hazen
631 downloads
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The Natural History of Selborne, Vol. 1
Gilbert White
631 downloads
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Agate Fossil Beds National Monument, Nebraska
United States. National Park Service
629 downloads
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Landscape in History, and Other Essays
Archibald Geikie
627 downloads
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The Storm
Daniel Defoe
626 downloads
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In Wildest Africa, Vol. 1
C. G. Schillings
625 downloads
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Histoire d'un ruisseau (French)
Elisée Reclus
622 downloads