Dusts and their action on the environmental conditions

The dust phenomenon, in terms of Meteorology named, Dusthaze and included of dry, coarse and suspended dust in the air that during long distance and deposited. This dusts cause increasing the concentration of suspended particles mainly particles less than 10 micron. At the moment ,Iran is a main center of dust , but those which enter from neighboring countries is another factor for air pollution .This dusts either enters from Saudi Arabia that mainly have silica structure and due to heavy, are precipitated sooner so, they have a fewer risks for healthiness. Or they enters from Iraq and have clay structures so, they are light and they have scroll longer. In recent years, drying wetlands in Iraq and Iran is due to increase dusts. In this year’s dried more than 40 percent of ponds in Iran. There is 2.5 million hectares wetlands area in Iraq, that after Persian Gulf War, about 1.5 to 2 million hectares of which was dried. This lead to United Nations, named Global Environmental Disaster for that years. Mesopotamian marshes, is one that dried ponds that its two-third of is in Iraq and one –third of it is in Iran, which caused drying Hawizeh marshes and Shadegan marshes in Iran. Besides that, draining wetlands to agriculture and oil exploration is another factor was to dry. Impounding dams like Ataturk, dehydration causes the Tigris and Euphrates .So, eventually Mesopotamian dried. But the bottom line, dusts causing all kinds of disease such as Heart disease, Respiratory disease, effect of cancer and cause tissue damage plants and animals, damage of historic building and worst avoid the influence of the Sun.