空气汙染 (空氣汙染) kōngqì wūrǎn
          
              kōngqì wūrǎn 
              
              noun 
              air pollution 
              Domain: Modern Chinese 现代汉语
              
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                Notes: Variant of 空氣污染 (Guoyu '空氣汙染'; Wikipedia '空氣污染')