Water Pollution

Essay specific features

 

Issue:

Science

 

Written by:

Amy D

 

Date added:

August 12, 2012

 

Level:

University

 

Grade:

A

 

No of pages / words:

4 / 970

 

Was viewed:

5113 times

 

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Essay content:

Pollution is also caused when silt and other suspended solids, such as soil, washoff plowed fields, construction and logging sites, urban areas, and eroded river banks when it rains.[David Krantz] Pollution in the form of organic material enters waterways in many different forms as sewage, as leaves and grass clippings, or as runoff from livestock feedlots and pastures...
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When natural bacteria and protozoan in the water break down this organic material, they begin to use up the oxygen dissolved in the water. Many types of fish and bottom-dwelling animals cannot survive when levels of dissolved oxygen drop below two to five parts per million. When this occurs, it kills a lot of aquatic organisms which leads to unbalance in our food chain...
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