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[Water and the population-environment relation in Mexico: an evaluation using environmental statistics].


 This work uses the example of water to evaluate the degree to which environmental statistics can be used to study the relation between population and the environment in Mexico. The theoretical viewpoint adopted is that demographic dynamics do not have direct effects on the environment, such effects instead being mediated by technical, economic, and cultural factors. The work begins by describing and comparing three frameworks for collection of statistical data on the environment: the Framework for the Development of Environmental Statistics, the Framework for Indicators of Sustainable Development, and the Pressure-Response model. The importance of water in sustaining life, in agriculture, in spread of disease, and as an element articulating the population-environment relationship is then discussed. The availability, levels of disaggregation, and compatibility of environmental data from various sources are then examined. The author concludes that although Mexico has an enormous institutional capacity to produce statistics concerning the environment, data are independently collected by different agencies using different methodologies and are not compatible. The environmental statistics regarding water organized according to the prevailing frameworks make it impossible for example to determine how health or mortality patterns are modified by the quality or scarcity of water, or to what extent population is exerting pressure on the water supply. Additional data are needed if the relationship is to be fully understood.
