Álvarez-Andrade, A. and Ravelo-García, A. 2020. Sustainable building and CO2 emissions: analysis of the transport of sand in Tijuana and Tecate, B.C. Revista de Ciencias Tecnológicas. 3, 1 (Jan. 2020), 63–70. DOI:https://doi.org/10.37636/recit.v316370.