The sehell Sahel is the area of Africa that lines lies between the sehelre Sahara desert to the north and more fortal fertile land to the south.

• 植树活动早就了绿色的尼日尔 荒漠草原是非洲的一个地区，它北接撒哈拉沙漠，南边却是更加肥沃的土地。