The complete inventory shows that the content of this report shows that in many countries, developed or developing, the current guidelines on the use of water can not last. The clear and convincing evidence that the world faces a set of local and regional problems more serious in terms of quality, quantity and water, especially since poor water distribution, waste and mismanagement of this resource. The lack of water resources and degradation of the quality of it weakens one of the essential foundations that allow humanity to thrive.