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In Mexico, as in many other Latin American countries, the lack of a development plan and/or prevention in aquaculture to environmental variability is evident. In the State of Colima, aquaculture presents lags in terms of technical and productive capacity especially for growing tilapia Oreochromis spp. Surveys were performed to farmers and experts, in addition to consulting scientific literature sources, and identifying different risk factors arising from the practice of aquaculture in order to assess the vulnerability of the sector. The main risk factor associated with hydrometeorological phenomena, for which the need to define high-risk areas, even more, given the uncertainty of the same due to global climate change is recognized. This study proposes to implement a comprehensive program of technological conversion and control measures for alien species that also consider aquaculture production schemes based on the efficient use of water, and to consider using this endemic species for cultivation.

Este artigo pretende estudar a inserção do Brasil no Mecanismo de Desenvolvimento Limpo (MDL) do Protocolo de Quioto, por meio de projetos em energia limpa, enfatizando a cooperação entre países desenvolvidos e em desenvolvimento e visando as ações práticas que esse mecanismo permite desenvolver para se alcançar o desenvolvimento sustentável e para conter o aquecimento global. Para isto, realizou-se extensa revisão bibliográfica dos acordos internacionais referentes às mudanças climáticas e de livros e artigos sobre a inserção brasileira no Protocolo de Quioto e no Mecanismo de Desenvolvimento Limpo. O Protocolo de Quioto é um acordo internacional que prevê a redução das emissões de gases de efeito estufa por intermédio de mecanismos flexibilizadores. O Mecanismo de Desenvolvimento Limpo é o único que permite a participação de países em desenvolvimento, para que eles reduzam emissões por meio de projetos que busquem o desenvolvimento sustentável. Neste contexto, o Brasil surge como um país atrativo para o recebimento destes projetos, por sua vocação para desenvolver fontes alternativas de energia e pela sua liderança no processo negociador do Protocolo. O MDL configura-se, portanto, em uma grande oportunidade para o Brasil, visto que esses projetos representam uma fonte de recursos financeiros para que o país busque o desenvolvimento sustentável, além de incentivarem um maior conhecimento científico e a adoção de novas tecnologias.This article intends to study the insertion of Brazil at the Clean Development Mechanism (CDM) of the Kyoto Protocol, through clean energy projects, emphasizing the cooperation between developed and developing countries, and aiming the practical actions that this mechanism allows to build up in order to reach the sustainable development and to stop the global warming. To achieve this, an intense bibliographic review of the international agreements concerning climate change, and books and articles about the Brazilian insertion on the Kyoto Protocol and on the Clean Development Mechanism was done. The Kyoto Protocol is an international agreement, which predicts the reduction of the greenhouse gases emissions through flexibly mechanisms. The Clean Development Mechanism is the only one that allows the participation of developing countries, for them to reduce emissions through projects that look for sustainable development. In this context, Brazil emerges as an attractive country to receive these projects, due to its vocation to develop alternative sources of energy and for its leadership on the Protocol's negotiation process. The CDM is therefore a great opportunity to Brazil, since these projects represent a source for financial resources for the country to seek the sustainable development, besides encouraging a greater scientific knowledge and the adoption of new and clean technologies.

El presente trabajo evalúa el comportamiento de la temperatura del flujo de aire en un colector solar de lecho de rocas, mediante un modelo matemático que simula las temperaturas del flujo de aire a la entrada y salida del colector. El modelo relaciona la geometría, la radiación incidente en el colector y las constantes propias del colector determinadas experimentalmente. Para el análisis se realizaron tres pruebas en las que se midieron las temperaturas del ambiente, de entrada y salida en el colector y la radiación solar incidente.The present work evaluates the behavior of the temperature of the flow of air in a solar collector of channel of rocks, by means of a mathematical model that simulates the temperatures from the flow of air to the entrance and exit of the collector. The pattern relates the geometry, the incident radiation in the collector and the constants own collector determined experimentally. For the analysis they were carried out three tests in those that the temperatures of the atmosphere were measured, of entrance and exit in the collector and the solar incident radiation.