Human+waste-+Pollution

There are many types of pollution that are in the water that must be cleaned out. These pollutants can be in the form of many disease from various types of pollutants.

http://store.applebazaar.com/blog/wp-content/uploads/2009/10/DrinkingPollutedWater.jpg

Article- http://www.treehugger.com/files/2009/06/five-ways-water-gets-polluted.php

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