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 preservation and careful use of food, especially in war time. Economic works on the availability of food are entered under Food supply
--subdivision Habitat--Conservation under individual animals and plants and groups of animals and plants, e.g. Fishes--Habitat--Conservation; Corn--Habitat--Conservation