“大漠孤烟直,长河落日圆。”这是一种美好的意境。可真要在这意境里生活,你又能坚持多久,一星期?一个月?还是一年?你要和无尽的风沙抗争。每天早上,你要用力推开被沙掩住的门。你要走出几十里地,才能拉来饮水。每一丛梭梭、每一枝沙柳,在你眼里都是天堂一般的风景。风沙里,几乎种不下任何作物,牛羊能吃的食物也极其有限,你的生计无从谈起。活不了命,有什么心情欣赏自然之美?土地沙化,被称为“地球癌症”。中国有三分之一 “The desert solitary smoke straight, the river fell yen. ” This is a beautiful mood. You really want to live in this mood, how long can you persist, a week? A month? Or a year? You have to fight with the endless wind and sand. Every morning, you have to push hard against the door covered with sand. You have to go dozens of miles before you can draw water. Each cluster Haloxylon, each Salvia, in your eyes are paradise-like landscape. In the sand, almost no crop is planted, and the food that can be eaten by cattle and sheep is extremely limited. Your livelihood can not be discussed. Life is not life, what mood to enjoy the beauty of nature? Land desertification, known as “Earth cancer ”. One third of China