CauseDue to contamination of the various toxic substances that come from human activities, community activities, both on economic growth. Development of the agricultural industry, as well as expanding the growing area, as a result of the increase of population expansion and fragmentation of the industry, designed to region through lack of water pollution control and management of that standard. Animal breeding and aquaculture ponds which supply water to waste containing high-concentration waste water management systems, lack of appropriate. As well as the natural water content decreased.
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