An excess of artificial light, especially near urban areas, reducing visibility of stars, etc. in the night sky.

(derogatory) The uncontrolled flow of genes into wild populations, as from domestic, feral, and non-native species.

The contamination of the atmosphere by noxious gases and particulates.

Excess noise which is unpleasant or harmful.

(obsolete) nocturnal emission

plural of nocturnal pollution

plural of air pollutant

Any substance that gives rise to air pollution

The pollution of soil, for example by sewage or toxic chemicals.

(obsolete, euphemistic) Masturbation.