Ammonia assessment from agriculture: U.S. status and needs.

@article{Aneja2008AmmoniaAF,
  title={Ammonia assessment from agriculture: U.S. status and needs.},
  author={Viney P. Aneja and Jessica Blunden and Kristen M. James and William H. Schlesinger and Raymond E. Knighton and Wendell Gilliam and Gregory D. Jennings and Dev Niyogi and Shawn Cole},
  journal={Journal of environmental quality},
  year={2008},
  volume={37 2},
  pages={
          515-20
        }
}
Recent studies suggest that human activities accelerate the production of reactive nitrogen on a global scale. Increased nitrogen emissions may lead to environmental impacts including photochemical air pollution, reduced visibility, changes in biodiversity, and stratospheric ozone depletion. In the last 50 yr, emissions of ammonia (NH3), which is the most abundant form of reduced reactive nitrogen in the atmosphere, have significantly increased as a result of intensive agricultural management… 

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