近来北京一些新开发的小区遍地都是不许入内的绿地,虽是绿意盎然,然而烈日当空之际,人们似乎更加怀念那婆娑的树阴。是种草还是植树风沙灾害已成为中国的心腹之患,尤其是我国北方地区属世界四大沙尘暴区之一的中亚沙暴区的一部分,其危害深远, Recently, some newly-developed residential areas in Beijing are green areas that are not allowed to enter. Although green areas are abundant, people seem to miss the whirling trees even more when the sun is dawn. Grass or sand blown sandstorms have become the henchman in China, especially in the sandstorm areas of Central Asia, one of the four major sandstorm areas in the world in northern China. The damage is far-reaching,