问题描述： Why is the Great Green Wall so important?回答不少于三十个单词 1个回答 分类：英语 2014-11-15 问题解答： 我来补答 Because it not only blocks the wind that carry a lot of sand and erode rocks to sand,but also holds water and soil,which is very important not only to the protection of the environment,but also to agriculture in western provinces of China. 展开全文阅读
