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The concept, and implementation, of coordinated global climate governance at the metropolitan level is one of the biggest challenges in most of the world's cities. Yet--ironically--it is also one of the most overlooked aspects of the international environmental agenda. Specifi- cally, one of the main challenges is to achieve coordination in decision making, as well as in the implementation of actions to homologate the objectives of the different government agendas at all levels, i.e. the constitution of climate and environmental policies not only at the federal level but also at the state and municipal level (in the Mexican case). This article reviews the link achieved between the nine municipal governments that make up the metropolitan area of Guadalajara (AMG) through PACmetro, which promotes coordinated climate governance and addresses the gaps in international mechanisms for climate change policies. The above, generated through the synergies of different agendas, through the Institute for Development Planning and Management (Imeplan). Imeplan has integrated different actors, from different levels, to carry out coordinated actions on urban climate policies in western Mexico that contribute to the construction of a common urban agenda. The conclusion shows the contributions of Latin American local governments to a coordinated climate governance according to local contexts and how the will of cities contributes to the strengthening of the link between global climate governance, the exercise of paradiplomacy between different public, private and hybrid actors towards a common urban agenda. [ABSTRACT FROM AUTHOR]

The increasingly evident deterioration of public health due to atmospheric pollution has forced governments to design and implement diverse policies for the control of air pollutants. Relying on quantitative methods, we investigate the effectiveness of intergovernmental policies for the abatement of air pollution in four metropolitan areas (Guadalajara, Monterrey, Valle de Mexico, and Valle de Toluca) over a ten year period. Our statistical analysis shows that, when observed concurrently, the efforts of these governments to reduce the concentrations of sulphur and nitrogen dioxids have been effective only partially. In the cases of Guadalajara and Monterrey, our qualitative analysis reveals that specific characteristics of these policies (the degree of participation of industries and municipal governments) and the existence of international commercial liaisons (export-oriented industries tend to adopt environmental-friendly policies) explain, to a large extent, the evolution of the concentration of pollutants in each city. [ABSTRACT FROM AUTHOR]