Many academicians regard that the cause of formation of sand - dust storm mainly is the vegetation in hungriness is destroyed 摘要关于沙尘暴的成因，学界大多认为其是近期以来人为破坏荒漠植被的结果。
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The information was released at a press conference on sand storms held by the china meteorological administration ( cma ) in beijing on tuesday 这则信息是由中国气象局（ cma ）周二在北京召开的一次关于沙尘暴的新闻发布会上发布的。
