Topreventthedesertscomingnear,Chinahasplantedbillionsof...
问题详情：Topreventthedesertscomingnear,Chinahasplantedbillionsoftrees---toreplacedestroyedforestsandasbarriersagainstthesand.Thisisn’tacure,though,sayexperts,asthirstytreescanmaketheproblemworsebytaki...