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English definition of “pollutant”

pollutant

noun [C] uk   /pəˈluː.tənt/ us    /-t̬ənt/
a substance that pollutes: Sulphur dioxide is one of several pollutants that are released into the atmosphere by coal-fired power stations.
(Definition of pollutant from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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