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Ecology, or ecological science, is the scientific study of the distribution and abundance of living organisms and how the distribution and abundance are affected by interactions between the organisms and their environment. The environment of an organism includes both physical properties, which can be described as the sum of local abiotic factors such as solar insolation, climate and geology, as well as the other organisms that share its habitat. The term oekologie was coined in 1866 by the German biologist Ernst Haeckel, although it seems that Henry David Thoreau had already invented it in 1852 "Revisiting the Natural Contract", by Michel Serres, in Ctheory, May 11, 2006 ; the word is derived from the Greek οικος (oikos, "household") and λόγος (logos, "study"); therefore "ecology" means the "study of the household nature".

The word "ecology" is often used in common parlance as a synonym for the natural environment or environmentalism. Likewise "ecologic" or "ecological" is often taken in the sense of environmentally friendly.

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Ecology is usually considered a branch of biology, the general science that studies living organisms. Organisms can be studied at many different levels, from proteins and nucleic acids (in biochemistry and molecular biology), to cells (in cellular biology), to individuals (in botany, zoology, and other similar disciplines), and finally at the level of populations, communities, and ecosystems, to the biosphere as a whole; these latter strata are the primary subjects of ecological inquiries. Ecology is a multi-disciplinary science. Because of its focus on the higher levels of the organization of life on earth and on the interrelations between organisms and their environment, ecology draws heavily on many other branches of science, especially geology and geography, meteorology, pedology, chemistry, and physics. Thus, ecology is considered by some to be a holistic science, one that over-arches older disciplines such as biology which in this view become sub-disciplines contributing to ecological knowledge.

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Cornell students award grants today: Students in a class at Cornell University's College of Human Ecology will awar... http://bit.ly/4NuCS8
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Cornell students award grants today: Students in a class at Cornell University's College of Human Ecology will awar... http://bit.ly/4NuCS8
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Human Ecology, College of - The College responds to human needs by improving nutrition and health, advancing environmental design and technology, promoting human development, and securing economic and social well-being for individuals, families, and communities through integrated programs of research, outreach, and teaching.
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Apparel - Provides an opportunity to study and research fibers, fabrics, apparel, and the apparel industry from design, management, historical, and scientific perspectives.
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Environmental Analysis - The common goal of the department is to develop approaches to the planning, design, and management of settings such as offices, housing, and health facilities that satisfy the needs of those who use and are affected by those environments.
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Management - Seeks to uphold nationally recognized programs through research, teaching, and outreach in family and social welfare, health, and consumer policy in terms of its application through program planning, management and evaluation.
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Division of Nutritional Sciences - The largest academic unit in the United States devoted to human nutrition. It is also one of the most diversified, with expertise in molecular and human nutrition, nutrition education, nutritional qualities of food, international nutrition, and food and nutrition policy.
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Human Development - The major foci of the department are behavioral and psychological development from conception through later life.
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