The success of climate and natural resource protection depends amongst others on the expansion of renewable energies. The policy paper describes the central results of the RESCUE study as well as the challenges and steps required to expand renewable energies in order to achieve greenhouse gas...

The sustainable energy transition taking place in the 21st century requires a major revamping of the energy sector. Improvements are required not only in terms of the resources and technologies used for power generation but also in the transmission and distribution system. Distributed generation...

This is a review of the literature available on data for the EROI (prior to this special issue) of the following 12 sources of fuel/energy: oil and natural gas, coal, tar sands, shale oil, nuclear, wind, solar, hydropower, geothermal, wave/tidal and corn ethanol. Unfortunately, we found that few...

This study explores the impact of oil depletion on the energetic efficiency of oil extraction and refining in California. These changes are measured using energy return ratios (such as the energy return on investment, or EROI). I construct a time-varying first-order process model of energy...

Norwegian oil and gas fields are relatively new and of high quality, which has led, during recent decades, to very high profitability both financially and in terms of energy production. One useful measure for profitability is Energy Return on Investment, EROI. Our analysis shows that EROI for...