飘零的落叶或许说明不了什么,但数字总是有表情的。可能很多人不信。中国最大的三片针叶林区大兴安岭、长白山地区和西南横断山区70%的天然林已被采伐;长期过度放牧导致1/2以上的草场已经退化,1/4的草场严重退化,近20年来,产草量已下降1/3～1/2……当看到这样的一组组数据时,人们或许 Falling leaves may not explain anything, but the numbers are always expression. Many people may not believe it. 70% of the natural forests in Daxinganling, Changbai Mountain areas and the southwestern Hengduan Mountains, the three largest coniferous forest areas in China, have been harvested; over 1/2 of the pasturelands have been degraded due to long-term overgrazing, and one-fourth of the pastures have been seriously degraded. Over the past 20 years , Grass production has dropped 1/3 ~ 1/2 ... ... When you see such a set of data, people may