RT Journal Article T1 Assessing the sustainability dimension at local scale: Case study of Spanish cities A1 González García, Sara A1 Andrade Fernández, Elena A1 Moreira Vilar, María Teresa A1 Feijoo Costa, Gumersindo A1 Rama Caamaño, Manuel K1 Spanish cities K1 Composite indicator K1 Spain K1 Sustainable city K1 Sustainability indicators K1 Three-letters code AB Nowadays, cities host most of the world population. As a result of human activities within their boundaries, most greenhouse gases emissions, natural resources consumption and waste generation are concentrated in urban areas. For these reasons, studies focusing on assessing the sustainability of cities have increased in recent decades. Bearing in mind the three pillars of sustainability (social, economic and environmental), this study aims to evaluate the level of sustainability of 31 representative Spanish cities through multiple sustainability indicators, which have been aggregated into a composite sustainability indicator that is reported by a three-letter code. Thus, each pillar of sustainability is represented by a letter A, B or C in the three-letter code, so that the letter A corresponds to the best rate and C to the worst.Within the geographical and socio-demographic framework of Spain, the results show considerable differences between the cities in the south and the north of the country. Accordingly, most of the cities with the best sustainability scores according to the award of at least two A in the three-letters code are located in the north of the country. Examples of this category are Pamplona and L’Hospitalet de Llobregat (both ranked as AAA). Cities such as Murcia, Gijon, Badajoz and Huelva obtained the worst ranking with the CCC rating. For this group of cities, actions for the improvement of sustainability have been identified PB Elsevier SN 1470-160X YR 2020 FD 2020 LK http://hdl.handle.net/10347/24304 UL http://hdl.handle.net/10347/24304 LA eng NO Ecological Indicators, Volume 117, October 2020, 106687 NO This research was supported by a project granted by the Spanish Government and FEDER/Ministry of Science and Innovation – Spanish National Research Agency (CTQ2016-75136-P) and by a project granted by Xunta de Galicia (project ref. ED431F 2016/001). Dr. S.G.-G. would like to express her gratitude to the Spanish Ministry of Economy and Competitiveness for financial support (Grant reference RYC-2014-14984). The authors belong to the Galician Competitive Research Group GRC ED431C 2017/29 and to the CRETUS Strategic Partnership (ED431E2018/01). All these programs are co-funded by FEDER (UE) DS Minerva RD 24 abr 2026