Editor’s note
The following abstract describes a publication that is only available as a downloadable PDF.

CoverDeveloped by Montana State University Extension and the University of Wyoming
Adapted with permission

This guide is one in the Exploring Energy Efficiency and Alternatives (E3A): Understanding Energy series. Making informed decisions about energy requires an understanding of where energy comes from and how it is used. This guide describes the sources of energy used in the U.S. and how that energy is used.


  • Energy use in homes and in agriculture
  • Imported energy sources
  • Nonrenewable energy sources
  • Primary energy sources
  • Renewable energy sources
  • Uses of energy


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