The water on earth as existent today, theoretically took 1.8 billion years to get the way it is. Asteroids from the outer-solar system belt fell upon the surface of the earth until it turned into the oceans, seas, lakes, ponds, and ground water we need to survive. Water is limited, so it recycles itself in a recurring cycle known as the water cycle: Evaporation, condensation, precipitation, runoff/storage. Chemically, water is a universal solvent, a polar covalent molecule created by two atoms of hydrogen for every one atom of oxygen. It is unique in its own way, just as it makes a part of what our world is, the solar system's distinct little blue planet.  

Modern cities have developed water treatment systems to transform the water around us into drinkable freshwater. However, in other regions of the world that isn't a reality. In developing countries around the world, there exists strict water discipline, irrigation, and more extensive technology is required--technology that in certain situations isn't available or affordable. Cultures and religion also surround water. Myths, legends, and stories about how the rain was created, how the water on earth started, and even a few creation stories here and there. Art has been inspired through the centuries. This is but a brief description on the eternal impact of water on the inhabitants of the earth.