@article{Hahn2018, author = "Robert W. Hahn", title = "{Choosing Among Fuels and Technologies for Cleaning Up the Air}", year = "2018", month = "6", url = "https://kilthub.cmu.edu/articles/journal_contribution/Choosing_Among_Fuels_and_Technologies_for_Cleaning_Up_the_Air/6471101", doi = "10.1184/R1/6471101.v1" }