IOT FOR URBAN ENVIRONMENTAL LEARNING: MONITORING GREEN URBAN AREAS WITH LOW-COST SENSING TECHNOLOGIES - Tabuenca, Bernardo; Martín, Sergio; Cruz-Ruiz, Alberto; Uche-Soria, Manuel; García-Alcántara, Vicente; Gilarranz-Casado, Carlos (INTERNATIONAL TECHNOLOGY, EDUCATION AND DEVELOPMENT CONFERENCE, 2026)