| http://www.w3.org/ns/prov#value | - Society currently attempts to track the manufacture and distribution of a large number of diverse substances, including (1) natural resources such as animals, plants, oil, minerals, and water; (2) chemicals such as drugs, solvents, petroleum products, and explosives; (3) commercial by-products including pollutants such as radioactive or other hazardous waste; and (4) articles of manufacture such a
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