are highly significant. Another aspect I consider to be of delicate actuality concerns the planets limitations, which albeit they are not singled out exactly in those terms, are nevertheless addressed, as for example in the inter-relations between sustainability and population dynamics.The Agenda 21 addresses the balance of interests struck between the planet and development embodied in the sustainable development concept from various different angles: protection of the atmosphere, energy transition, soil stewardship, marine resources, freshwater resource management, desertification, biological diversity, the value of education, etc.In the actions it proposes, the document does not fail to address the importance of financial mechanisms or the production and supply of technology to provide essential support to sustainability management, the development of science and education, and culture, as the basic elements for the construction of environmental awareness. It also contains, when addressing the revisions of national and international institutions needed to achieve sustainable development, the complex problems associated to qualifying administrative personnel for efficient management and other issues we usually address today under the heading of governability.Although it was criticised because of its low level of operability, the Sustainable Development Council [CDS] was a sensible product of the Agenda 21, however, it was inadequately accommodated in the United Nations System and lacked the coordinating powers that were expected of it.Finally, the most important feature of the period from 1992 to 2012 has been the participation of public opinion, the increasingly important engagement of the citizenry in this debate, the generalised awareness of the importance of dialogue in which the Internet is in the front line of the communication media. In 1992, in spite of the important participation of civil society organisations, it was not possible to sound the feelings or feel the pulse of the interest of the citizen or of society at large. Nowadays, everything points to a civil society occupying a position of outstanding importance and consideration. The Rio+20 will take place in Rio but it will simultaneously involve the whole world through the virtual medium.Among the resolutions from the Rio 92, in which area were there no advancements?I am not pessimistic about progress made; I am aware that it is necessarily slow in the international sphere. In the national spheres, however, I find it a bit harder to understand, because the necessary leverage is in the hands governments and they have instruments for political economic and social action embedded in the hearts of their States.However, political processes are not linearRelations among States continue to be ritualistic in their respect for the principle of sovereignty, and that requires time. Governments represent the will of their citizens according to their national legal judicial regimes, democratic consensus wherever democracy is in place, identification of interests, and so on. They have the faculty of being able to determine the internal legal-judicial conditions and so, naturally they can be more efficacious.As for the failure to materialise many of the expectations created in 1992, we cannot ignore the vested interests that existed and their opposition, which paralysed many actions. Resistance to change is strong not only in the national