The world is based upon water.water is like a solvent every thing can be dissolved in it if we see our world in which we live there is 70 percent water and 30 percent of soil with out water this universe is nothing
The human body is also totally depended on water without food it may possible that we can survive in this world but without water we can not be able to survive in this world.                                                                                                                                                                                                                The  every thing which is present in this world contain the water if we considers only fruits they are totally filled with water and every vegetables can not be without water water is necessary for every one in this life.
As the water is the control of many diseases it prevent from many diseases instead of this when you drink dirty or impure water there are many diseases which can be attacked on man if we drink 7 to 8 glass of water in a day then we prevent ourselves from many diseases.                                                                                                                                                                                                          
many researcher says that there will be third world war on the water issue so if we use the water careley then we prevent ourselves from many issues.