@misc{indiciaee89503b691e9,
  title = {Pumping coal.},
  author = {Gunjan Sinha},
  year = {2006},
  doi = {10.1038/scientificamerican0506-20},
  url = {https://pubmed.ncbi.nlm.nih.gov/16708481/},
  note = {Source identifier: 16708481}
}