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-- See Also the narrower term Agricultural wastes Recycling

-- See Also Energy conservation
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

-- See Also the narrower term Fish culture Water-supply Recycling

-- See Also the narrower term Pavements, Asphalt Recycling

-- See Also the narrower term Remanufacturing

-- See Also Salvage (Waste, etc.)
Here are entered works on reclaiming and reusing equipment, parts, structures, etc. Works on the processing of waste paper, cans, bottles, etc. are entered under Recycling (Waste, etc.).

-- See Also Waste products
Here are entered works on the debris resulting from a process, such as manufacturing, that is of no further use to the system producing it. Works on commercial products with recycled content are entered under Recycled products.
--subdivision By-products under specific industries, e.g. Gas manufacture and works--By-products

-- See Also the narrower term Water reuse