Pollution in World

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chiritzaCristian
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  • Added: 19-Apr-08

<b>Pollution</b>, in one sense, is the introduction of contaminants into an environment, of whatever predetermined or agreed upon proportions or frame of reference, that causes instability, disorder, harm or discomfort to the physical systems or living organisms therein.[1] <b>Pollution</b> can be in the form of chemical substances, or energy such as noise, heat, or light. Pollutants can be naturally occurring substances or energies, but are considered contaminants when in excess of natural levels ...

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Pollution in World

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