今年，北京的沙尘暴一次比一次大，一连刮了九次，从国家最高领导到全国人民都震惊了。北京作为首都，如果每天只看见发狂的风，黄色的沙，谁还敢去，何况北京正在申办奥运会 ?沙尘暴怎么形成的，答案很快找出来了，只因我国的荒漠化面积扩展迅速。更准确地讲，荒漠化又是被人 This year, the dust storms in Beijing have been shattered once and for all, nine times in a row, from the top leadership of the country to the people throughout the country. Beijing, as the capital city, can only find the mad wind and the yellow sand every day if they are daring to go. Not to mention Beijing is bidding for the Olympic Games. The answer to the dust storm has quickly come to light because of the rapid expansion of desertification in China. More precisely, desertification is again being taken