A climate-neutral urban Spain: the role of the Mission in advancing the transformative capacity of Spanish cities - Escario-Chust, Ana; Peris-Blanes, Jordi; Moreno-Serna, Jaime; Palau-Salvador, Guillermo; Segura-Calero, Sergio; Udovyk, Oksana (FRONTIERS IN SUSTAINABLE CITIES, 2026)