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polluting gas emission /pəlˈuːtɪŋ ˈɡas ɪmˈɪʃən/ n

中文：污染气体排放

中文 · 污染气体排放Español · emisión de gases contaminantesFrançais · émission de gaz polluants
Meaning：Most polluting gases are present in the atmosphere in minuscule quantities, but human activity increases their concentration.
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Air pollution

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