Question

The water on the surface of a pond is covered with a green growth,which has resulted in the death of all fishes in the pond.what could have been the cause of the death of the fish?

Answer 1

the green growth is also know n as algae
which stops the sunlight to reach to the pond surface and the surface plants do no survive

Answer 2

The growing of green growth on the surface of pond is of algae . This is known as Eutrophication . Due to the eutrophication the supply of oxygen decreases as the algae growth increases leading to the deficiency of oxygen into the water . Resulting into the Death of the aquatic animals .