Iran is one of the world’s most unique countries, in terms of climate with four desirable seasons. There are many climate varieties in Iran and from the word 14 climate, Iran favors 11 climates. This climate diversity has led to a variety of natural landscapes, which can hardly be seen in other countries. Iran has varied nature and climate contains abundant plants and animals which are amazing in both number and variety in comparison with other parts of the world. Iranian Vegetation diversity is more than twice the size of Europe continent and nearly equals the Indian subcontinent.