The dead zone in the Gulf of Mexico is primarily the result of
A)nonpoint sources of pollutants.
B)point sources of pollutants.
C)a natural cycle related to cold ocean currents.
D)industrial pollution by oil refineries in the New Orleans region.

Question

Quizplus · Accepted Answer

The dead zone in the Gulf of Mexico is primarily caused by nonpoint sources of pollutants, such as agricultural runoff from the Mississippi River watershed. These pollutants stimulate algal growth, which depletes oxygen in the water as the algae die and decompose. This oxygen depletion creates a "dead zone" where marine life can't survive.

The Dead Zone in the Gulf of Mexico Is Primarily