Human impact on the nitrogen and phosphorus cycles happens primarily through our use of:

Question

Quizplus · Accepted Answer

Human impact on the nitrogen and phosphorus cycles primarily occurs through our use of fertilizers, which contain high levels of these nutrients that can runoff into waterways and cause harmful algal blooms and hypoxia (low oxygen) in aquatic ecosystems. While fossil fuels can also impact these cycles through nitrogen oxide emissions, it is less significant compared to fertilizer use. Groundwater, marine resources, and minerals do not directly impact these cycles in significant ways.

Human Impact on the Nitrogen and Phosphorus Cycles Happens Primarily