Prehistoric rock paintings from Northern Mexico are becoming better known. Twenty sites for a single municipio in the state of Nuevo Leon have recently been described. Not all the paintings that are being found are a spectacular as the ones…

Prehistoric rock paintings from Northern Mexico are becoming better known. Twenty sites for a single municipio in the state of Nuevo Leon have recently been described. Not all the paintings that are being found are a spectacular as the ones…

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Prehistoric rock paintings from Northern Mexico are becoming better known. Twenty sites for a single municipio in the state of Nuevo Leon have recently been described. Not all the paintings that are being found are a spectacular as the ones…

Con la profundización de la globalización, a partir de la década de 1970 se producen cambios económicos, políticos, sociales y culturales, que conducen a una nueva concepción del desarrollo. En este contexto, la estrategia de desarrollo local constituye una opción…

Both in Chile and in other countries, managing municipal solid waste (MSW) is a difficult problem, due to the various variables explaining it. Several background data suggest that the possibilities of solving the problem are associated to the education and…

The Environmental Management System (EGS), was constituted at the University of Antioquia in order to improve the environmental conditions, health and well being levels of the community; promoting the efficient use of resources, involving cultural changes in consume patterns, knowledge…

The improvement or design of a solid waste management system in any locality should be based on the knowledge of the solid waste characteristics, such as generation per capita, density and composition; depending on the type of treatment that is…

To solve the several problems caused from the deficient solid waste management in many of our municipalities, must be considered 4 substantial items: planning, legislation, the most citizen participation and the financing aspect. Failing in any of those subjects is…

The objective of this paper is the development of a mathematical model of anaerobic digestion that simulates the principal control variables in the process, and helps the planning and operational phases in normal and particular situations of operation in the…