Marine dead zones can form when nutrient run-off causes certain types of algae to grow very quickly and then die off. As dead algae decompose, oxygen is removed from the water. With
less oxygen available, fish and other marine animals can die. What would be one practical
way to reduce marine dead zones?
A Pump oxygen into the water using equipment on fishing vessels.
B Add bacteria that are able to eat the fast-growing algae.
C Prevent fertilizer and other wastes from entering rivers and streams.
D Harvest marine fish in dead zone areas to reduce oxygen use.