The 2017 Spring Workshop of the Seminar of Sustainable Economy was held at the Faculty of Law and Social Sciences in Ciudad Real last Friday. Several papers in progress were presented and discussed by all the researchers involved. The main topics discussed during the meeting were: support policies for CSP technologies, evolution of the costs in wind on-shore power, investment in energy efficiency R&D, and models for optimal decisions on power storage. In the photo, from left to right, José García Quevedo, from University of Barcelona; María Jesús Gutiérrez Pedrero, from UCLM; Fernando Callejas Albiñana, from UCLM; Natalia Caldés Gómez, from CIEMAT; Emilio López Cano, from UCLM; Miguel Ángel Tarancón, from UCLM; María Jesús Ruiz Fuensanta, from UCLM: Consolación Quintana Rojo, from UCLM; and Pablo del Río González, from CSIC.