2.Industry sources, such as plant, fish sauce, sugar, canned food factory factory factory, paper, paint factory, the factory, leather tanning, and mining industry sources these. To the release of organic waste into the water, causing dramatic.Such as lead, mercury, arsenic, cadmium cyanide in the water, and as well
.
3. Source agriculture, as farmers to use fertilizer, pesticide and pesticide fertilizer more, respectively.
.Pesticides and pesticides as well as dung will be it flows into the water. Therefore accumulate in the water สารดังกล่าว more will eventually be born Yu called special application and accumulation. Toxic heavy metal in the water.
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