the basic options of these projections. If the first assumption were not verified in the long term, the political and social equilibrium of the world could be questioned. If development occurs, but energy efficiency does not come with it, the problems of environment, reserves depletion and energy production financing will become so enormous that hardly any room will be available for any new, expensive and sophisticated technologies such as SPS. REFERENCES [1] B. Dessus, Encrgie-Developpement-Environnement, un enjeu planetaire au 21e siecle. Revue de 1'Energie no 415, nov. 1989. [2] J.M. Martin, L'intensite energetique de 1'activite economique dans les pays industrialises, Economic et Societe no 41, 1988. [3] B. Dessus and F. Pharabod, Jeremie et Noe, deux scenarios energetiques mondiaux a long terme, Revue de 1'Energie, June 1990. (Reference made to the flood and the Noa Ark). [4] J.R. Frisch, Evolution des methodes de la prospective energetique. Bulletin IEPF no. 4, 1989. [51 F. Pharabod, Atlas Mondial de 1'Energie / World Energy Atlas, Aditech, Paris, 1989. [6] Population Bulletin of the United Nations, no. 14, 1982. [7] World Energy Conference, 1989 Survey of Energy Resources, WEC, London, 1989. [8] B. Dessus, Les promesses des energies renouvelables. La Recherche, no. 214, October 1989. [9] C(T) = C(T-l) + 0,471 (E(T) • 3). [10] J. Goldemberg et al., Energy for a Sustainable World, Wiley Eastern, New Dehli, 1988. [11] F. Pharabod and C. Philibert, Les centrales solaires LUZ, Comite d'Action pour le Solaire, Paris. 1990.
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