Considering that the vast majority of housing stock existing in 2011 will be used to satisfy residential needs in the year 2020 and beyond, ecological urban regeneration appears clearly as the key issue in relation to global urban sustainability for the most part of this century. Thus, if the 1992 Rio Summit identified the urban environment as the main arena where the global environmental crisis should be fought, 20 years later we must emphasize that it is mainly to the real cities and territories around us now where we should address our attention. On the other hand, the actual crisis of representative democracy, as well as the growing awareness attained during the last decades about the real complexity involved in the process of decision-making in general and especially in relation with the construction of the city, brings forward the idea of governance as another relevant issue to consider unavoidably when we consider the future of urban planning.
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