… effect (Albritton et al. 1995). This report reviews and summarizes the extent of human alteration
of the N cycle, and consequences … understanding of this human-caused global change. …

… we are confident that human alterations of the nitrogen cycle have: … effect (Albritton et al.
1995). This report reviews and summarizes the extent of human alteration of the N cycle, and con…

… papers on nitrogen, this overview discusses the natural N cycle, … altered the N cycle, and
reviews the consequences of these … Human alteration of the global nitrogen cycle: sources and …

… What we find is there has been this significant change to the nitrogen cycle over the past
300 years,‖ said Meredith Hastings, assistant professor of geological sciences at Brown and …

… Changes to the global nitrogen cycle affect human health well beyond the associated
benefits of increased food production. Many intensively fertilized crops become animal feed, …

… Human activity has greatly altered the nitrogen cycle on Earth over the past few decades,
with major effects on both human … coastal marine systems where nitrogen is now the largest …

… Nitrogen cycling processes affect radiative forcing directly through emissions of nitrous
oxide (N 2 O) and indirectly because emissions of nitrogen oxide \((\hbox{NO}_{x})\) and …

… to drive future advances in the interaction between humans and the nitrogen cycle as we try
to reap nitrogen's benefits, while minimizing its negative impacts on people and ecosystems. …

… fixation, either by lightning, free-living, and symbiotic microbes, or by anthropogenic processes.
Nitrogen fixation … 3 − , nitrogen oxides (NO, NO 2 ), N 2 O 5 , and N 2 O or organic N. The …

… The global nitrogen cycle follows the pathway of the local nitrogen cycle, only on a grander
scale. The global cycle is diagrammed in Figure 2. The atmosphere is the largest pool, …