@misc{indiciaeefc6ba64413e,
  title = {Observed decrease in atmospheric mercury explained by global decline in anthropogenic emissions},
  author = {Yanxu Zhang and Daniel J. Jacob and Hannah M. Horowitz and Long Chen and Helen M. Amos and David P. Krabbenhoft and Franz Slemr and Vincent L. St. Louis and Elsie M. Sunderland},
  year = {2016},
  doi = {10.1073/pnas.1516312113},
  url = {https://pubs.usgs.gov/publication/70164522},
  note = {Source identifier: 70164522}
}