Since the mid-1900s, humans have been exerting an ever-increasing impact on the global nitrogen cycle. Human activities, such as making fertilizers and burning fossil fuels, have significantly ...

Nigel N. Clark, J. Todd Messer, David L. McKain, Wenguang Wang, Reda M. Bata, Mridul Gautam, Donald W. Lyons, Use of the West Virginia University Truck Test Cycle to Evaluate Emissions from Class 8 ...

Nitrogen is a key element controlling the species composition, diversity, dynamics, and functioning of many terrestrial, freshwater, and marine ecosystems. Many of the original plant species living in ...