@misc{indiciae9427d7463ea9,
  title = {Setting limits: Using air pollution thresholds to protect and restore US ecosystems},
  author = {Mark E. Fenn and Kathleen F. Lambert and Tamara F. Blett and Douglas A. Burns and Linda H. Pardo and Gary M. Lovett and Richard A. Haeuber and David C. Evers and Charles T. Driscoll and Dean S. Jeffries},
  year = {2011},
  url = {https://pubs.usgs.gov/publication/70006178},
  note = {Source identifier: 70006178}
}