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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.
Report Abuse. eutrophication is caused by excessive nutrients in the water causing the depletion of oxygen supply and death of water organisms. this is due to the soil rich in nutrients washed away to the water because there are no trees to hold the soil intact. for short, it is caused by deforestation...blue_13 Â· 9 years ago.utrophication is caused by excessive nutrients in the water causing the depletion of oxygen supply and death of water organisms. this is due to the soil rich in nutrients washed away to the water because there are no trees to hold the soil intact. for short, it is caused by deforestation... blue_13 Â· 9 years ago.