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Water pollution is the introduction into fresh or ocean waters of chemical, physical, or biological material that degrades the quality of the water and affects the organisms living in it. This process ranges from simple addition of dissolved or suspended solids to discharge of the most insidious and persistent toxic pollutants (such as pesticides, heavy metals, and nondegradable, bioaccumulative, chemical compounds). "http://www.botany.uwc.ac.za/SCI_ED/grade10/ecology/conservation/poll.htm"

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Velda Hauck

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3y ago

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