1. Air pollution by a mixture of smoke and fog
   - smog

See also: smoggy

Type of: air pollution

• family Davalliaceae
• family Delphinidae
• family Dematiaceae
• family Dendrocolaptidae
• family Dennstaedtiaceae
• family Dermestidae
• family Dermochelyidae
• family Desmidiaceae
• family Desmodontidae
• family Diapensiaceae
• family Diaspididae
• family Dicamptodontidae
• family Dicksoniaceae
• family Dicranaceae
• family Didelphidae
• family Dilleniaceae
• family Dinornithidae
• family Diodontidae
• family Diomedeidae
• family Dioscoreaceae
• family Dipodidae
• family Dipsacaceae
• family Dipterocarpaceae
• family Discoglossidae
• family doctor