Chemical fertilizers have serious adverse effects on the environment, especially nitrogen, which is a major factor in the contamination of the water. It is also the main reason that caused the extinction of the creatures in the sea, and the use of excessive phosphate has a negative effect on many. Water is the medium for transporting nutrients, nitrogen and phosphate, which are the main causes of marine creatures can grow and fertility. But on the other hand, Both substances are distributed in the water, the oxygen supply is limited, for life. Over time, one of these creatures will be lost (such as fish or shellfish).