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pollutant

noun [C]
 
 
/pəˈluː.tənt/ US  /-t̬ənt/

Definition

a substance that pollutes: Sulphur dioxide is one of several pollutants that are released into the atmosphere by coal-fired power stations.Environmental issuesRubbish and wasteProtection and protectorsDirt and untidiness
(Definition of pollutant noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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