飞机进入蒙古国后,机翼下所见到的是一片荒漠,沙漠一片连着一片,极少有绿色,只是到蒙古首都乌兰巴托附近才见到些许绿意。我们原以为,蒙古国有150多万平方公里的面积,而人口仅250多万,且90%集中在城市和铁路沿线,大部分地区荒无人烟,境内人为破坏少,应该植被茂密、生态环境好,没想到这里的荒漠化程度竟比中国内蒙古自治区严重。看来,地球大气环境变化带来的荒漠化加剧是北方生态恶化的主要原因,人为破坏的因素是次要的。 After the plane entered Mongolia, it saw a desert under the wing. There was a piece of desert with few greens. Only a few greenery was seen near the Mongolian capital Ulan Bator. We thought Mongolia had a land area of ​​more than 1.5 million square kilometers and a population of over 2.5 million. 90% of the population was concentrated in cities and railways. Most areas were unmanifested, with little human destruction. They should have dense vegetation and a good ecological environment. It is even worse than the Inner Mongolia Autonomous Region. It seems that the worsening desertification brought about by changes in the Earth’s atmosphere is the main reason for the deterioration of the ecology in the north and the factor of vandalism is of secondary importance.