Library Resource
janvier, 1989
États-Unis d'Amérique, Afrique sub-saharienne, Amérique septentrionale, Amérique latine et Caraïbes
It is clear from the failure of our efforts in many countries to halt the desertification process - deserts are now advancing at a rate of nearly 15,000,000 acres a year worldwide (Worrall 1984) (that something was missing in our knowledge of the problem). Four discoveries have been made that enabled us to design a simple holistic model to manage resources successfully in a sustained and economic manner.