SMOG


Meaning of SMOG in English

/ smɒg; NAmE smɑːg; smɔːg/ noun

[ U , C ] a form of air pollution that is or looks like a mixture of smoke and fog , especially in cities :

attempts to reduce smog caused by traffic fumes

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WORD ORIGIN

early 20th cent.: blend of smoke and fog .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.