text: of a fifth challenge, the strengthening of technical assistance for development, which has had remarkable results, for example in the fields of education, training, health, food production and the preservation of land and forests. The enhancement of this technical assistance is justified not only by the existing considerable needs but also by its contribution to the lasting success of adjustment efforts. In this context it must not be overlooked that diversification of production remains, in many countries, a long-term endeavour that will require prolonged financial and technical support. I cannot omit from this list a sixth challenge, the need to preserve the ecological balance, and the rational utilization of natural resources. Growth is sustainable only if based on the rational utilization of existing resources. We must integrate more systematically and completely ecological costs in our economic decisions. Switzerland notes with satisfaction the increasing awareness of the problem of environmental degradation and the initiative the Assembly has taken in this connection by making preparations for the United Nations Conference on Environment and Development to be held in 1992. This is an exceedingly complex challenge, one that affects fields as different as the impact of demographic pressure on the deterioration of the soil, the disappearance of forests and fauna, and pollution of the ozone layer. It is essential that all of us meet our responsibilities in this field. This pictuJre of recent upheavals and the opportunities and risks that emanate from them is certainly not exhaustive, but it expresses our firm belief that all States must make new efforts and show more open-mindedness to further change. In a world in which the State is less and less able to remain aloof from external influences and the international impact of its actions, the efforts of all must be complemented by closer, more effective international co-operation. RH/33 A/S-18/PV. 4 157 
analysis: The text discusses the importance of strengthening technical assistance for development, diversifying production, and preserving the ecological balance, which suggests a strong connection to economic development and environmental issues. The text also touches on the need for international cooperation, which is a common theme in international relations and economic development.