It should be noted that there is a correlation between different natural factors, so that each region is characterized by its specific features as a climatological unit or bioclimatic region formed by various morphopedologic environments, and each containing a special plant species. The use of natural resources must be done in such a way that it does not create a disturbance in the environment’s balance. Some factors such as fire, flood, volcano, earthquake, climate change, erosion and, eventually, human interference can disrupt this balance, in which erosion emerges as a warning factor. It indicates that soil is collapsing; the vegetation that caused the balance is now being destroyed. To balance or mitigate destructive factors and be able to protect and maintain natural resources, each ecological or bioclimatic unit should be identified and assessed in terms of its factors. In this regard, Iran is divided in terms of bioclimatic conditions into 5 regions (humid, semi-humid, semi-arid, arid and desert bioclimatic regions), each of which was divided into smaller sub-units, so that in each region the morphopedologic environment was examined and dominant plant species was determined; then, the degradation and erosion characteristics were determined according to the structure of the rock (lithology), and for each unit region, a sample was thoroughly examined and general suggestions for preservation and maintenance were presented (see Appendix tables).