| Abstract: | The principle of common but differentiated responsibilities, one of the key concepts of sustainable development, has dual grounding; the pressures developed countries place on the global environment; and the technologies and financial resources they command. Though the developed countries are reluctant to admit the first grounding, the developing countries have a strong leverage to induce the former to accept differentiated treatment in their favor.Thus, this principle has become to be reflected in some conventions in the field of environment and development. The reflection of this principle takes two forms: one is "double standards" in environmental protection standards as well as their implementation in favor of developing countries; and the other is assistance by developed countries for sustainable development of developing countries. At present, "double standards" seem to be inevitable, but, they must be temporary measures in view of the integral and interdependent nature of global environment. And, in order to overcome these "double standards", the attainment by developing countries of their sustainable development seems to be indispensable. In a substantial number of environmental conventions, developed country parties assume obligations to assist development country parties. However, these obligations are confirmed to "incremental costs" necessary for implementation of the convention concerned, and do not extent to assistance for sustainable development in general.  Changing consumption and production patterns seems to be one of the most important aspects of the principle of common but differentiated responsibilities, since this concept takes issue, for the first time, with the pattern of development pursued by developed countries. However, this concept has much difficulties in translating into international legal terms.Though it may be difficult at present to characterize the principle of common but differentiated responsibilities to be a customary norm of international law, it is surely a basic principle of international law, and as such, may operate as a guiding principle for law-making, as well as for the interpretation and application of conventions in the field of environment and development. |
