Education requests teaching structural hierarchy not only for the strict discipline courses, but in the related ones. For example: not only teaching structural hierarchy in geology for geologists, but also teaching structural hierarchy in biological, in physical, in chemical and in other systems, too. Environmental science requests comparison of processes in various hierarchy levels (and size levels), however, the education in - this sense - is selective and disciplinary in their earlier studies, that is restricted to the systems of the given course discipline. If the previous (i.e. college level) education focuses of these comparable hierarchical structures in every important disciplines, then in postgrad courses teachers can use their results of preparation studies in forming concepts of more complex system processes.