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[ Charles Hall // Energy Returns ] from Extraenvironmentalist on Vimeo.

Interview with Charles Hall made during the International Conference on Degrowth in the Americas in Montreal 2012.

Extraenvironmentalist about the video: Dr. Charles Hall of the Dept. of the SUNY-Environmental and Forest Biology describes the EROEI concept he developed along with the ideas behind his creation of the field of biophysical economics.