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Because of Sub - Tropical high Pressure Influence, arid regions such as steppes, deserts and kewir extanded in the most parts of Iran.
Human destructive function also intensified under these conditions.
On the other hand, importance of the desertic and steppic regions in Iran must be cosidered to undrestand ecological environments.
Under human pressure, plant and animal ecology had a retrogradation.
In Rood - e - shoor basin, study of ecosystem, specially with intensive vegetation and interesting food chains, immigrant birds, must be on priority.
Sweeping, rubbish and also invasion of dangerous insects are essential impacts on environment and also on human in this studied area.