Shows you the main direction of this web site for keeping you from getting lost.
 
Detailed description about the physics, chemistry, biology properties of water
 
Tells the stories about how water related to the origin of human history.
 
Shows you how important water is in our life.
        
Information about the distribution of water is the world, such as oceans, seas, rivers...
 
Presents how water cycle works.
 
Addressing the serious problems of water pollution, flood, etc.
 
Links to many other web sites about water.