Literature and textbooks on Hygiene and ecology

Hygiene and ecology - essence

Ecology is the study of the relationships between living organisms, including humans, and their physical environment. Ecology examines organisms at the individual, population, community, ecosystem, and biosphere levels. Ecology overlaps with the closely related sciences of biogeography, evolutionary biology, genetics, ethology, and natural history. Ecology is a branch of biology and is not synonymous with environmentalism.

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