Filling up all the dry weedy areas with cement is certainly impossible to do, but at least we should do that to areas that are close to residential areas. Studies need to be done. In some other countries, slopes that are close to the freeways are cemented. Even in LA, most of the open areas are irrigated well. In additional to the cosmetic issue, irrigated vegetation tend not to get burnt so easily. When you look at similar areas in SD, they are covered with brown and long weeds. They look like semi-drought areas in Africa. It catches fires so easily.
