Somecountries are building a great wall of trees across Africa. It is called theGreat Green Wall. The aim is to bring life to the dry lands and help to fightthe bad environment.
The wallis 8,000 kilometers long and 15 kilometers wide. It covers from Senegal in thewest to Djibouti in the east, on the south of the Sahara Desert (撒哈拉沙漠). So far, Senegal has madethe best progress by planting about 11,000,000 trees.
Many yearsago, there were few trees in that area and the winds used to be very strong. Itwas harmful to the fields. Also, there was little rain, so few plants couldgrow and many people went hungry. Since the tree planting project started, thetrees have provided food for the local people and increased the wetness (湿度) of the air. Little by little,there appeared green fields for people to grow plants.
Theproject which began in 2007 is supposed to cost a total of 8,000,000,000dollars. Many countries are trying their best to help to continue the planting.So we will be able to see the whole green wall across Africa in the nearfuture!
