"Ökologie." . . "Environmental Health." . . "Homme Influence sur la nature." . . "Homme - Influence sur la nature." . "Umweltökonomie." . . "Ecology." . . . . . . . "The complete ecology fact book : ed. by philip nobile and john deedy" . . . "The complete ecology fact book" . "The complete ecology fact book"@en . . . "The complete Ecology Fact Book" . "The Complete ecology fact" . . . . . . . . . . . . . . . . . . . . . "Pollution." . . "Écologie humaine." . .