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the act of polluting or the state of being polluted.
the introduction of harmful substances or products into the environment: air pollution.
Source: Dictionary.com
pollution | Define pollution at Dictionary.com
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Pollution - Wikipedia


Pollution is the introduction of contaminants into the natural environment that cause adverse ..... Jump up ^ "Pollution - Definition from the Merriam-Webster Online Dictionary". Merriam-w...

Pollution | Definition of Pollution by Merriam-Webster


Define pollution: the action or process of making land, water, air, etc., dirty and not safe or suitable to use — pollution in a sentence.

Pollution | Define Pollution at Dictionary.com


Pollution definition, the act of polluting or the state of being polluted. See more.

Pollutant | Define Pollutant at Dictionary.com


(pə-l t'nt) A substance or condition that contaminates air, water, or soil. Pollutants can be artificial substances, such as pesticides and PCBs, or naturally ...

What is pollution? definition and meaning - BusinessDictionary.com


Definition of pollution: Presence of matter (gas, liquid, solid) or energy (heat, noise, radiation) whose nature, location, or quantity directly or indirectly alters ...

pollution - Dictionary Definition : Vocabulary.com


Pollution is unwanted, harmful stuff contaminating an environment. The race to develop clean energy is motivated by high levels of pollution that people fear are  ...

pollution -- Kids Encyclopedia | Children's Homework Help | Kids ...


Unsure of the meaning of a word? Double-click it to look it up in Merriam- Webster's ... Photograph:The smokestacks of chemical plants send pollution into the air.

What is the definition of pollution? | Reference.com


Pollution is defined as the bringing of unsafe or toxic substances into the environment, such as the soil, the air and water. The act of polluting usually renders the ...