Water is the source of Because of it， only the beautiful planet; because of it， the earth will be full of vitality; because of it， only the beautiful mountains， clear water， blue But many people are a waste of water resources， although the earth's water content is very rich， a huge number， but can directly use it in production and life， but Because the water is salty and bitter， not drinking， not pouring in， it will be difficult for the In today's world， fresh water only accounts for three percent of the total water， of which 2/3 is still ice， so the world's fresh water resources are scarce!
