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Therefore, human causes of eutrophication include the use of agricultural fertilizers. Other causes include sewage and aquaculture, which is the growing or farming of fish, shellfish and aquatic plants. Wastewater from certain industries and burning fossil fuels can also contribute to eutrophication.
Major sources of excess nutrients which are responsible for eutrophication are agricultural fertilizers, livestock wastes and domestic sewage. Agricultural fertilizers provide inorganic nutrients like nitrates and phosphates which play an important role in this process.utrophication can be of two types.Man madeWhen the waste materials like sewage effluents are thrown in the water than it contains some nutrients which causes this problem.