EXECUTIVE SUMMARY: Indiana utilizes three primary energy sources, coal, petroleum, and natural gas. Coal represents 49 percent of the state's 1997 energy consumption. Petroleum follows at 30 percent, natural gas at 19 percent, and renewable energy sources at 2 percent.
Rupp, J. A., Randolph, J. C., Gerteisen, S. P., Franklin, M., Radue, A. K., Schools, E. 2002, Indiana energy report 1999: Indiana Geological Survey Open-File Study 02-03, 232 p., 123 fig.
Notes: Publications in the Indiana Geological Survey Open-File series have been inconsistently named using a variety of series titles including "Open-File Report," "Open-File Map," and "Open-File Study." Prior to 1994, a publication in this series was generally referred to as an "Open-File Report" (but not always). To help reduce confusion created by these inconsistencies, the IGS now refers to every publication in the Open-File series as an "Open-File Study." To be entirely correct in writing a bibliographic reference for a publication, one should use the series name and number that appears on the publication itself.
See OFS02-02 for a summary of this report
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