A dead zone has been documented off the coast of Oregon. Which of the following could contribute to the formation of the dead zone?

Question

Quizplus · Accepted Answer

High nitrogen levels can lead to an overgrowth of algae, which in turn can lead to a depletion of oxygen in the water as the algae die and decompose. This lack of oxygen can create a dead zone. High phosphate levels can also contribute to algae growth, but nitrogen is typically the primary factor in dead zone formation. High oxygen levels and high carbon dioxide levels are not typically factors in the formation of dead zones.

A Dead Zone Has Been Documented Off the Coast of Oregon