Question

what is the source of the nitrogen and phosphorus that create the dead zone
oil spills
emission from power plants
excess fertilizer carried into the river
increased nutreient cycling due to invasive species

Answer 1

The primary source of the nitrogen and phosphorus that create the dead zone is excess fertilizer carried into the river. This fertilizer comes from agricultural runoff, urban runoff, and other sources that contribute to nutrient pollution in water bodies. This excess nutrient pollution fuels the growth of algae, which leads to oxygen depletion and the creation of dead zones. In some cases, nutrient pollution may also come from sewage treatment plants or industrial sources. Oil spills, emission from power plants, and increased nutrient cycling due to invasive species can also contribute to nutrient pollution, but they are not the primary sources in this context.

Answer 2

pick one

Answer 3

The primary source of the nitrogen and phosphorus that create the dead zone is excess fertilizer carried into the river.