Energy Return on Investment A Unifying Principle for Biology, Economics, and Sustainability

“The book Energy Return on Investment, self-deprecatingly put forth as a nontechnical ‘story,’ succeeds in providing a cohesive and intellectually rigorous theory that transcends economics and biology. …I highly recommend this book to policymakers and the business community to more accurately forecast the future, as well as to engineers and scientists of all disciplines. … Energy Return on Investment is technically relevant and written with accessible language.” (John R. Schramski, BioScience, July, 2018)

“In Energy Return on Investment, systems ecologist Charles A. S. Hall argues that to truly understand most investments, one must view them in terms of energy. … Energy Return on Investmentis a solid introduction to a vital subject, and Hall is uniquely qualified to author it. Hall invented the very term energy return on investment, and he’s done decades of seminal research on the phenomenon that it describes.” (Frank Kaminski, resilience.org, April, 2018)