Résumé
The question of how to conciliate ecology, economy and society was first raised in the 1970s with UNESCO’s Man and the Biosphere (MAB) programme. The term, ‘sustainable development’, a product of the growing awareness that ensued, was defined in 1987 as: ‘development that responds to the needs of the present without compromising the ability of future generations to meet their own needs’ (Brundtland 1988).