Edited sentence: 3.5.3.9-2.Biomass (corn).Charles Hall and Prieto would later largely corroborate the Solar PV value, with empirical real-world analysis from the utility-scale solar PV installation projects, in Spain.Fossil gas in a CCGT.Hydro (medium-sized dam).In an influential, 2013 analysis of the energy return on energy invested for common energy sources, the "unbuffered" (uncorrected for intermittency) EROEI for each energy source analyzed is as depicted in the table at right.J Kelly 2016 Figure 2.Nuclear (in a PWR).Solar PV (Germany).Solar thermal CSP (desert).Source:Lessons from technology development for energy and sustainability Universiy of Cambridge M.Wind (E-66 turbine).With the exception of the only two non-fossil baseload energy supplying systems, of biomass and nuclear, in order to approximate the steady electrical supply characteristics of a biomass or nuclear facility, the corrected for their intermittency/"buffered" EROEI stated in the paper for all low-carbon power sources, were lowered considerably due to weather variations, a reduction of EROEI proportional to how reliant these other sources of energy are, on the manufacture and use of back-up energy systems.With these lowered values, in more recent years other analysts have questioned if an industrial society reliant on new-renewables, would be capable of sustainable progress.energy sources in 2013