This contains my goals for, and reactions to, the Panel on ‘Strategies’ at the Workshop, ‘Advances in Energy Studies: Exploring Supplies, Constraints, and Strategies’, 23–27 May 2000, Porto Venere, Italy. The very ambitious goals for the four speakers were not fully realized; hence my...

We have applied standard energy analysis to 4 types of geothermal-electric technologies: liquid dominated, hot dry rock, geopressure, and vapor dominated. We find that all are net energy producers, i.e. they have an energy ratio exceeding unity, where energy ratio = net electric energy produced...