Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes`"…."`

Options

A. enhanced growth of algae
B. decrease in amount of dissolved oxygen in water
C. deposition of calcium phosphate
D. increase in fish population

Answer

A, B

Explanation

Fertilisers contain phosphates as additives. The addition of phosphates in water enhances. Algae growth. Such profuse growth of algae covers the water surface and reduces the oxygen concentration in water.
This leads to anaerobic condition, commonly with accumulation of abnoxious decay and animal death. Thus, bloom infested water inhibits the growth of other living organisms in the water body.
This process in which nutrient enriched water bodies support a dense plant population which kill animal life by depriving it of oxygen and results in subsequent loss of biodiersity is known as eutrophication.