The fresh water which can be used only includs these water which flows in the pools ,part of underground water and which is frozen in the it counts billion cubic kilometers ,it is
关于水的信息(要英文的)Water pollution is a serious problem now. Hundres of dead fish can be found on the surface of Haihe beeause of serious pollution. Besides Haihe, there are some other rivers lik
熊猫大王
