Modèles écologiques et aménagement de l'espace

Summary With the increased impact of man's activities resulting from the industrial revolution, the fall-out of his actions widens in both space and time. It is impossible to proceed any further in the exploitation of Nature on the basis of economic concepts founded on the pursuit of sectorial short-term profit. We must on the contrary observe the rules governing the biosphere and the ecosystems.Economic development must not upset the energetic equilibrium of the biosphere. This is possible on condition that we use essentially balanced energy sources, instead of the energy released by potential sources.The whole organization of economy is based on a linear principle, resulting in the exhaustion of basic materials and overload by often polluting waste. The acceleration of the circuit is artificially induced by publicity factors which, pretexting fashion, regards as garbage still usable goods. The perenniality of ecosystems is ensured by the recycling of materials, an economy founded on the same principle can alone ensure the future of mankind.The sectorial development of economy and of professional training contributes to make it more difficult to organize the healthy management of natural resources.The obstacles to the achievement of a healthy policy of resource management are not technical, but pedagogic, economic and political.