And in fact, in more and more countries, load-bearing earthen structures are not allowed to be built anymore although they're traditional and have lasted for hundreds of years, and not because the material is weak, but because there are no architects and engineers who know how to deal with that material.
Y, de hecho, cada vez en más países no permiten las estructuras de tierra portantes aunque son tradicionales y perduraron durante muchos años. Y no porque el material sea débil, sino porque no hay arquitectos e ingenieros que sepan trabajar ese material.