One comments, that according to a recent study, and carried out others in the past, the form as the water is being administered in the West has left a legacy important of problems for the nature. Although the study sample that the citizens of western Europe and the United States or are protected of the threat of the water, the wild life that depends on the water in those regions so or is assured, concludes the investigation It is added to us, that some critics affirm that the study contains certain elements of subjectivity in terms of the form as the different threats from the water are analyzed and combined. Nevertheless, as it indicates to Mark expert water Smith of the Union the International for the Conservation of Naturalize (IUCN), this one is one ” synthesis potentially ponderous” of the knowledge that is had on the problem. And according to Gary Jones, executive president of the Cooperative Center of Investigation of the Water in Canberra, Australia ” it is a very important and opportune global analysis of the joint threats that face the security of the water for humans and the loss of rivers for biodiversity”..