pollutant
Noun
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is a type of: waste, waste material, waste matter, waste product - any materials unused and rejected as worthless or unwantedsubtypes:
- ddt, dichlorodiphenyltrichloroethane - an insecticide that is also toxic to animals and humans; banned in the United States since 1972
- cfc, chlorofluorocarbon - a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans
- halon - a compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms; very stable; used in fire extinguishers although it is thought to release bromine that depletes the ozone layer
- nitrogen oxide - any of several oxides of nitrogen formed by the action of nitric acid on oxidizable materials; present in car exhausts
- sulfur dioxide, sulphur dioxide - a colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain
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