Iran’s diversity in climatic conditions and its rich aquatic and terrestrial biodiversity and

ecosystems are rooted in its unique geography. Pressure has been put on environmental

resources and biodiversity due to persistent droughts, heavy stress on and pollution of scarce

water resources, air pollution in urban and industrial areas, as well as degradation of

rangelands, threats to wild life and biodiversity, natural resources overexploitation and soil

erosion. Located in the dry belt of the planet Iran is usually suffering from low precipitation and

high temperature which leads to water evaporation and water shortages.