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

(obsolete, euphemistic) Masturbation.

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

plural of nocturnal pollution

(obsolete) nocturnal emission

the presence of an undesirable sight that can ruin the aesthetic appeal of an area; the visually unattractive elements of a landscape.

A system aimed at controlling pollution by allocating each firm a certain amount of pollution permits which allows them to pollute up to a certain limit. If firms pollute less, they are able to sell there permits to firms that pollute more hence creating a permits market.

Any substance that gives rise to air pollution

One who self-pollutes.

plural of self-polluter