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Chemical pollution happens when certain compounds are improperly disposed of. This can affect the environment by disrupting the processes of the ecosystem. Chemical pollution happens when certain compounds are improperly disposed of. This can affect the environment by disrupting the processes of the ecosystem.
Noun. 1. pollution-undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities. impureness, impurity-the condition of being impure. environmental condition-the state of the environment.