{"thcode":2,"term":{"code":1723,"name":"industrial pollution","parent":769,"scope":"Introduction of harmful substances into the environment by manufacturing, power generation, mining, or material processing."},"uf":[{"name":"PCBs","usewith":false},{"name":"oil spills","usewith":{"code":1804,"name":"petroleum","parent":1005,"scope":"Naturally occurring hydrocarbons, typically fluid or gas, often of economic use.  Includes oil, natural gas, and asphaltic compounds found in tar sands and oil shales."}},{"name":"polychlorinated biphenyls","usewith":false}],"bt":[{"code":769,"name":"contamination and pollution","parent":1174,"scope":"Introduction of harmful substances into the environment by human action or natural processes."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":1724,"name":"mine drainage","parent":1723,"scope":"Introduction of harmful substances into the environment from mines and tailings."},{"code":2270,"name":"produced water","parent":1723,"scope":"Water produced during generation and development of energy resources, particularly hydrocarbons, as well as related fluids injected into reservoirs for energy development and associated waste disposal."}],"rt":[{"code":2274,"name":"PFAS","parent":769,"scope":"Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemical compounds that are an emerging contaminant."},{"code":1725,"name":"abandoned mines and quarries","parent":548,"scope":"Mines and quarries that have been abandoned and may expose harmful chemicals to the environment."},{"code":2273,"name":"coal ash","parent":2271,"scope":"Solid waste material remaining from the burning of coal."},{"code":2272,"name":"slag","parent":2271,"scope":"Solid waste material produced by the industrial processing of ore materials."},{"code":2271,"name":"solid industrial waste material","parent":1199,"scope":"Waste solid materials produced by industrial processing of earth materials, not simply material extracted in the search for ores."}]}