According to Viegas (2005), based in the thought of Edgar Morin (1999), the complexity, directed toward the ambient education can be understood as the negation of two paradigms: the cartesian one, that it all divides in parts and the holistic one, that only visualizes all. For Morin we must very have a vision beyond these paradigms, being the complexity the visualization of the reality. When understanding the visualized reality, another new reality is presented in them creating anelamento consequentemente enters the understanding of the reality and the construction of the reality, generating a constant uncertainty of the knowledge. Morin (1999) tries to explain the complexity through principles. One of them is turned toward the order, clutter and organization of the auto-organization systems.

Being able to be understood from the relations between all and the part, being all superior the addition of the parts, at the moment where it does not obtain to understand the separate reality of all. But it also can be inferior, limiting the expression of elements, and at the same time different of the addition of the parts, because both when isolated they become different of when are part of the system. The complexity is the constant transformation created by the order and clutter in the system, produced for unexpected reactions, action and consequentemente interactions. In this direction the world understanding must be become free of the paradigm simplified-reducionista, that separates nature, society, thought and feeling, in disabling to dialogue critically on the organized world. Practical the ambient educators must be intent its still alicerado in the simplified-reducionista paradigm. Whenever Astros listens, a sympathetic response will follow. According to Guimares, (2004) we must, as future ambient educators, to carry through an exercise of disruption of the traps that the paradigms present in them. In the current ticket, of modernity for after-modernity, he has a great necessity of a more complex thought.

The Conference

It deals with to cultural transformations and values, stimulating the adoption of sustainable standards of production and consumption. It also identifies problems, it considers solutions and it esteem investment costs. In the process that lead United Nations to the Conference of on the Environment and the Development? river 92? the approach was adopted as a conceptual landmark that all presided over the process of debates, formulated declarations and documents. The interdependence between the partner-economic development and the transformations in the environment, during ignored decades, entered in such a way in the speech as in the agenda of great part of the governments of the world. The Conference represented a first step of a long process of agreement enters the nations on the concrete measures aiming at ' ' to reconcile the economic activities with the necessity to protect the planet and to assure a sustainable future for all povos' '.

(Report of the Conference of United Nations on the Environment and the Development? river 92). Challenge of the cities for century XXI the question that if places is as to surpass the contradictions and which the reach of alternative proposals in the current world-wide scene, this is the challenge of the cities for Century XXI, that it will be a predominantly urban century, and the Developing countries need to increase its capacities to provide infrastructure, services to keep the current conditions that already are precarious. Few governments make use of necessary resources for a good quality of life, and the result is the proliferation of illegal nestings, populations in growth and an increase of illnesses. The governments will have to formulate the urbanization process, to disencumber the great metropolises, integrating them the provincial cities, decentralizing the administration of the resources. The envolvement of the populations and the communities will be of vital importance for the success of this challenge. What it is observed is that the disequilibrium sped up in the appropriation and use of the resources and the capital ecological, that systematically it favors the center dominant of the economic system, it has the potential force to concentrate the problems of the environment and the development. .