Second Conference on Economic Degrowth for Ecological Sustainability and Social Equity March 26-29th 2010, Barcelona Peak oil is not some fuzzy academic concern but a reality: for the US in 1970, for some 60 of 80 oil-producing countries and, at least for the moment, for the world since about 2005. In addition the net energy delivered to society (as opposed to the total) is declining in recent decades from 30 or more to one to ten or less to one as we have exhausted our largest, shallowest, closest to shore and highest quality oil and gas fields. While technological improvements have slowed the effects of depletion the net effects are that there is a declining EROI (Energy Return on Energy [and money] Invested). Most alternatives to oil and gas except hydroelectric or coal have a small or very small EROI, and even for these the highest EROI sites in […]