pollution

definition: the act of contaminating or polluting
example:
speech part: noun
synonyms: contamination
definition: the state of being polluted
example:
speech part: noun
synonyms: befoulment defilement
definition: undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities
example:
speech part: noun
synonyms:

pollution is explained and pronounced

How pollution is being used?