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Air pollution sources (Jfgbbu)

Environment (J)
     Related Term (Associative): ; Areas and regions (V)
    Environmental quality (Jf)
        Pollution (Jfg)
            Pollution of specific environments (Jfgb)
                Air pollution (Jfgbb)
                     Use For: Air pollutants
                    Greenhouse effect (Jfgbbg)
                         Related Term (Associative): Global warming (Jbmwnw)
                    Smog (Jfgbbs)
                    Air pollution sources (Jfgbbu)
                        Mobile sources (Jfgbbum)
                        Stationary sources (Jfgbbus)
                             Use For: Point sources