专题十五 任务型阅读中考英语 ( 全国版 )Passage 1(2018 陕西 )阅读下面短文 , 根据短文内容 , 完成下列各题
Eleven countries are building a great wall of trees across Africa
It is called the Great Green Wall
The aim is to bring life to the dry lands and help to fight the bad environment
The wall is 8,000 kilometers long and 15 kilometers wide
It covers from Senegal in the west to Djibouti in the east, on the south of the Sahara Desert( 撒哈拉沙漠 )
So far, Senegal has made the best progress by planting about 11,000,000 trees
Many years ago, there were few trees in that area and the winds used to be very strong
It was harmful to the fields
Also, there was little rain, so few plants could grow and many people went hungry
Since the tree planting project started, the trees have provided food for the local people and increased the w