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1、Sand Storm &The Ecological Environment Question,How we should to prevent Sand Storm keeping to destroy our hometown and damage our health,Introduction Outline Summary,Introduction,The concept of sand and dust storm The examples of the main sources of the sand and dust storm on our earth The descript

2、ion of Sand and dust in china,The concept of sand and dust storm,dust or sand storm , also known as sand storms or dust storms. It is a kind of natrual phenomena, which caused by strong wind. Usually ,strong wind blow Terrestrial dust up to the air,then make the all atmosphere turbid.,Dust and sand

3、storm is always occur in such area where is shot of water and its soil is dry and loose on the ground. In additon,this phenomena is happened in winter and spring. Many areas of the chinese Inland Northwest, the number of sandstorm days up to more than 30 days annual. grassland region commonly known as dust storms for Rattus wind.,The examples of the main sources of the sand and dust storm,United States Colorado state The desert areas of Egypt and the desert area in Sudan The northwest of china,Outline,The sandstorms causes and physical mechanisms Sandstorm hazards and hazards metho

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