Question

What does excessive algae on water cause?

When algae cover a river surface, it causes depletion of oxygen in water. This is known as ____.​

Answer 1

Answer: Eutrophication.



Nitrates is increased which causes a bloom, this leads to the water quality to become poor and will eventually kill life int the water, known as eutrophication.



Hope this helps!

Answer 2

Eutrophication

Step-by-step explanation:

Greek word meaning "well-nourished"