@misc{indiciaeb72d320fb4e3,
  title = {What to do about coal.},
  author = {David G Hawkins and Daniel A Lashof and Robert H Williams},
  year = {2006},
  doi = {10.1038/scientificamerican0906-68},
  url = {https://pubmed.ncbi.nlm.nih.gov/16925038/},
  note = {Source identifier: 16925038}
}