Here are entered works on the condition resulting from the action of environmental contaminants. Works on the substances which contaminate or degrade the environment are entered under Pollutants. --subdivision Environmental aspects under individual environmental pollutants, e.g. Copper--Environmental aspects
--subdivision Waste disposal under types of industries, industrial processes, facilities and institutions, e.g. Construction industry--Waste disposal; Metals--Finishing--Waste disposal; Universities and colleges--Waste disposal
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