ecology (n.)

1873, oecology, "branch of science dealing with the relationship of living things to their environments," coined in German by German zoologist Ernst Haeckel (1834-1919) as Ökologie, from Greek oikos "house, dwelling place, habitation" (from PIE root *weik-(1) "clan") + -logia "study of" (see -logy). In use with reference to anti-pollution activities from 1960s.

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