Here are entered general works on the conservation of all forms of energy. Works on the conservation of energy as a physical concept are entered under Force and energy. --subdivision Energy conservation under types of industries, facilities, etc., e.g. Construction industry--Energy conservation
Here are entered works on the processing of waste paper, cans, bottles, etc. Works on reclaiming and reusing equipment, parts, structures, etc. are entered under Salvage (Waste, etc.) --subdivision Recycling under individual chemicals and groups of chemicals and individual materials and types of materials, e.g. Copper--Recycling; Metals--Recycling
--subdivision Waste minimization under types of industries, industrial processes, facilities, and institutions, e.g. Construction industry--Waste minimization; Metals--Finishing--Waste minimization; Universities and colleges--Waste minimization
Here are entered works on the protection of wildlife, as a matter of public policy. Works on methods of bringing wildlife populations to desired levels are entered under Wildlife management. --subdivision Conservation under individual animals and groups of animals, e.g. Fishes--Conservation