The source of heavy metals entering the marine environment comes from 2 sources that is important is the movement of heavy metal compounds from the River because of the insurgency or natural decay of chemical and physical changes of the Earth's crust and from human activity, especially industrial, bringing various heavy metals used in the production process, and another source, one source is the movement of heavy metal compounds from the atmosphere. In the form of dust or vapor that, when rain water to flow through it will wash into the water source.
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