Ecology is a human science as well. There are many practical applications of ecology in conservation biology, wetland management, natural resource management (agroecology, agriculture, forestry, agroforestry, fisheries), city planning (urban ecology), community health, economics, basic and applied science, and human social interaction (human ecology). For example, the Circles of Sustainability approach treats ecology as more than the environment 'out there'. It is not treated as separate from humans. Organisms (including humans) and resources compose ecosystems which, in turn, maintain biophysical feedback mechanisms that moderate processes acting on living (biotic) and non-living (abiotic) components of the planet. Ecosystems sustain life-supporting functions and produce natural capital like biomass production (food, fuel, fiber and medicine), the regulation of climate, global biogeochemical cycles, water filtration, soil formation, erosion control, flood protection and many other natural features of scientific, historical, economic, or intrinsic value...The word "ecology" ("Ökologie") was coined in 1866 by the German scientist Ernst Haeckel (1834–1919). Ecological thought is derivative of established currents in philosophy, particularly from ethics and politics. Ancient Greek philosophers such as Hippocrates and Aristotle laid the foundations of ecology in their studies on natural history. Modern ecology became a much more rigorous science in the late 19th century. Evolutionary concepts relating to adaptation and natural selection became the cornerstones of modern ecological theory.

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  Environment and Ecology for Pennsylvania: Meeting the standards by Inc. Pearson Education (Author) http://www.amazon.com/gp/offer-listing/B007IYEHIC/ref=tmm_other_meta_binding_used_olp_sr?ie=UTF8&condition=used&qid=&sr=

 Prospector, Cowhand and sodbuster: Historic Places Associated with Mining, Ranching and Farming Frontiers  in Trans-Mississippi West Historical overview by the US Department of the Interior http://www.amazon.com/gp/offer-listing/B001KNO1YM/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&qid=&sr=

  Terra: Our 100-Million-Year-Old Ecosystem--and the Threats That Now Put It at Risk

http://www.amazon.com/gp/offer-listing/0374273251/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 

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 When the Rains Come: A Naturalist's Year in the Sonoran Desert http://www.amazon.com/gp/offer-listing/0816527628/ref=tmm_pap_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 

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 Landfill Disposal of Hazardous Wastes and Sludges (Pollution technology review)  http://www.amazon.com/gp/offer-listing/0815507739/ref=tmm_hrd_collectible_olp_sr?ie=UTF8&condition=collectible&qid=&sr=

 

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 Plant Engineers and Managers Guide to energy Conservation http://www.amazon.com/gp/offer-listing/0881732303/ref=dp_olp_used?ie=UTF8&condition=used

 

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 Rancho La Brea: A Record of Pleistocene Life in California http://www.amazon.com/gp/offer-listing/B000GJYPWO/ref=tmm_pap_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 

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 The longest cave http://www.amazon.com/gp/offer-listing/0394487931/ref=tmm_hrd_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 

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 The Vegetation of the New Jersey Pine Barrens http://www.amazon.com/gp/offer-listing/0486261999/ref=olp_page_2?ie=UTF8&condition=used&startIndex=10

 

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 American Littoral Society Handbook for the Marine Naturalist http://www.amazon.com/gp/offer-listing/0802773532/ref=tmm_pap_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 

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 Colloquia Pontica 1: New Studies on the Black Sea Littoral  http://www.amazon.com/gp/offer-listing/1900188015/ref=tmm_pap_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 

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  Seasons of Heron Pond: Wildings of Air, Earth and Water http://www.amazon.com/gp/offer-listing/0916144844/ref=dp_olp_collectible?ie=UTF8&condition=collectible

 

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 Krakatoa: The Day the World Exploded http://www.amazon.com/gp/offer-listing/0066212855/ref=olp_page_3?ie=UTF8&condition=collectible&startIndex=20

 

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  Wild Orchids of the Northeastern United States: A Field Guide  http://www.amazon.com/gp/offer-listing/0801483417/ref=dp_olp_collectible?ie=UTF8&condition=collectible

 

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The Eternal Frontier: An Ecological History of North America and Its Peoples http://www.amazon.com/gp/offer-listing/0871137895/ref=dp_olp_collectible?ie=UTF8&condition=collectible

 

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 The Humboldt Current: Nineteenth Century Exploration and the Roots of

 THE STORY OF THE WATER SUPPLY FOR THE COMSTOCK [ Nevada State

 Season on the Plain http://www.amazon.com/gp/offer-listing/0883490242/ref=tmm_hrd_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

  Down to Earth: Speeches and Writings of His Royal Highness Prince Philip, Duke of Edinburgh, on the Relationship of Man With His Environment http://www.amazon.com/gp/offer-listing/0828907110/ref=tmm_hrd_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 Big Coal: The Dirty Secret Behind America's Energy Future http://www.amazon.com/gp/offer-listing/0618319409/ref=olp_page_2?ie=UTF8&condition=collectible&startIndex=10

  First flowers of Our willderness http://www.amazon.com/gp/offer-listing/B005KDHRRQ/ref=dp_olp_used_mbc?ie=UTF8&condition=used

 Lost Mountain: A Year in the Vanishing Wilderness: Radical Strip Mining and the Devastation of Appalachia http://www.amazon.com/gp/offer-listing/1594489084/ref=tmm_hrd_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

 Only One Earth: The Care and Maintenance of a Small Planet

 

  John Burroughs (April 3, 1837 – March 29, 1921) was an American naturalist and nature essayist, active in the U.S. conservation movement. The first of his essay collections was Wake-Robin in 1871...In the words of his biographer Edward Renehan, Burroughs' special identity was  that of "a literary naturalist with a duty to record his own unique perceptions of the natural world." ...

The Writings of John Burroughs XVI "Time and Change" Limited Edition #365 http://www.amazon.com/gp/offer-listing/B00GKNO9EO/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

The Writings of John Burroughs VI: The Summit of the Years, Limited Edition, No. 365 http://www.amazon.com/gp/offer-listing/B00GKNVAYQ/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

The Writings of John Burroughs XIX "Under the Apple-Trees" Limited Edition #365 http://www.amazon.com/gp/offer-listing/B00GKPZ7UW/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

The Writings of John Burroughs II "Winter Sunshine" Limited Edition #365 http://www.amazon.com/gp/offer-listing/B00GKQ7O0W/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

The Writings of John Burroughs VI "Fresh Fields" Limited Edition #365 http://www.amazon.com/gp/offer-listing/B00GKNPZNI/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=

The Writings of John Burroughs XV " Leaf and Tendril" Limited Edition #365 http://www.amazon.com/gp/offer-listing/B00GKO6QNA/ref=tmm_other_meta_binding_collectible_olp_sr?ie=UTF8&condition=collectible&sr=&qid=