Nitrogen enrichment of ecosystems by human activity is largely driven by
A) addition of nitrogen fertilizers.
B) nitrogen pollution from burning of fossil fuels.
C) nitrogen fixation by bacteria in landfills.
D) both addition of nitrogen fertilizers and nitrogen pollution from burning of fossil fuels.
E) both addition of nitrogen fertilizers and nitrogen fixation by bacteria in landfills.

Question

Quizplus · Accepted Answer

Nitrogen enrichment of ecosystems by human activity is largely driven by both addition of nitrogen fertilizers and nitrogen pollution from burning of fossil fuels. Both sources contribute significant amounts of reactive nitrogen to the environment, leading to ecological issues such as eutrophication and biodiversity loss. Nitrogen fixation by bacteria in landfills also contributes to nitrogen enrichment, but to a lesser extent compared to these two major sources.

Nitrogen Enrichment of Ecosystems by Human Activity Is Largely Driven