The addition of domestic sewage waste into the water bodies makes the water nutrient-rich which supports the growth of plants and algae and is called eutrophication.
The excessive growth of aquatic algae and plants leads to a reduction in the amount of dissolved oxygen which affects the other aquatic animals.
Methods to reduce eutrophication :
Reducing pollution: The most effective way to reduce or stop eutrophication is to reduce pollution, especially water Pollution as it is the major cause of eutrophication.
Composting: The method by which organic waste is converted to useful and nutrient-rich compost is called composting, which can also reduce eutrophication.
Changing laws: The government should make strict punishment rules against the person or industries who makes water polluted by throwing waste materials, and toxic chemicals in the water.