to leave of the alluded conference, carried through in Sweden, many initiatives aiming at to the ambient questions, they start to gain space in the whole world. Important a proposal appears in 1987, intitled Our Common Future, or, as she was known: ' ' Brundtland' report; '. This document was elaborated by the World-wide Commission on Environment and Desenvolvimento (CMMAD), organism consisting of 21 countries, under the presidency of Prime minister of the Norway, Gro Harlem Brundtland. According to this report, ' ' the sustainable development is that one that takes care of to the necessities of the gift without compromising the possibility of proper the future generations to take care of its necessidades' ' (CMMAD, 1988, P. 46).
This report also presents aspects on the ambient degradation approaching causes and effect, considers international politics how much to the economic, social and ambient aspects, with objective to search the compatible economic growth with the preservation of the nature. According to Martins (1995, P. 46): ' ' The interests of the underdeveloped countries are identified, where the sustainable development directly appears related with the problems of the poverty, satisfaction of the basic necessities, and a specific approach with regard to the feeding, health and moradia' '. The necessary economic growth to support itself in practical that they conserve and they expand the base of environmental resources. Such growth is absolutely essential to mitigate the great poverty that if comes intensifying for the most part of the world in development. CMMAD (1988, P.
30): The consuming of the environment frequently was considered the result of the increasing demand of scarce resources and of the pollution caused for the improvement of the standard of living of the relatively rich ones. But the proper poverty polui the environment, creating another type of ambient consuming. To survive, the poor persons and hungry the many times destroy its proper environment: they knock down forests, they allow the extreme pasturing, they exaurem lands delinquents and they are a refugee in number each bigger time for the cities already congested.