Next Article in Journal
‘Sufferings Start from the Mothers’ Womb’: Vulnerabilities and Livelihood War of the Small-Scale Fishers of Bangladesh
Previous Article in Journal
Undergraduate Writing Promotes Student’s Understanding of International Sustainable Development in Horticulture
Previous Article in Special Issue
Implications of Energy Return on Energy Invested on Future Total Energy Demand
Article Menu

Export Article

Open AccessEditorial
Sustainability 2011, 3(12), 2496-2499;

Synthesis to Special Issue on New Studies in EROI (Energy Return on Investment)

Departments of Environmental and Forest Biology and Environmental Studies, Graduate Program on Environmental Science College of Environmental Science, Forestry State University of New York Syracuse, New York, NY 13210, USA
Received: 10 December 2011 / Accepted: 13 December 2011 / Published: 14 December 2011
(This article belongs to the Special Issue New Studies in EROI (Energy Return on Investment))
Full-Text   |   PDF [196 KB, uploaded 24 February 2015]


This paper is a synthesis of a series of twenty papers on the topic of EROI, or energy return on investment. EROI is simply the energy gained from an energy-obtaining effort divided by the energy used to get that energy. For example, one barrel of oil invested into getting oil out of the ground might return fifty, thirty, ten or one barrel, depending when and where the process is taking place. It is meant to be read in conjunction with the first paper in this special issue and also a number of the papers themselves. As such I try to summarize what general trends we might conclude from these varied and often highly technical papers. About half of the papers are reports on empirical analyses of various energy sources such as Norwegian or Gulf of Mexico oil, Pennsylvania gas and so on. About a quarter of the papers are methodological: how do we go about undertaking these analyses, what problems are there, what are the proper boundaries and so on. The final quarter are in a sense philosophical: since it appears that we will be living indefinitely in a world of decreasing EROIs, what are the economic, social and psychological implications? The rest of this paper summarizes the results of these studies. View Full-Text
Keywords: energy; EROI; economic; fuels; quality of fuels energy; EROI; economic; fuels; quality of fuels
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Hall, C.A. Synthesis to Special Issue on New Studies in EROI (Energy Return on Investment). Sustainability 2011, 3, 2496-2499.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sustainability EISSN 2071-1050 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top