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Environmental Aspects: Problems and Priorities

Man is increasingly creating most of his environment. In the process he has created significant hazards to his health. Some of the adverse effects are longstanding but related to rapid technologic change. There has been an accumulation of contaminants and waste products. Not only is population increasing, but there is also mounting per capita consumption. People continue to concentrate in urban centers. All these changes have greatly magnified the threats and complicated the problems of keeping adverse effects down to acceptable limits.
 This Conference is specifically addressed to threats arising from chemical pollutants, with special emphasis on the susceptibility of the fetus and child. It would be misleading, however, to believe that discussions can be limited to these important segments of the population, inasmuch as adverse effects of chemical pollutants following exposure in utero and childhood may not become manifest until late in adult life.
 Man's continued drive for material progress has produced many by-products and wastes, some of which are disadvantageous or clearly threatening to his health. A series of crises has resulted at a rapid rate from unforeseen consequences of environmental changes. Solution of these crises has been restricted by the traditional regard for the environment as a series of isolated compartments rather than as a highly integrated continuum of strongly interdependent factors. Multiple factors act singly or in combination, sequentially or simultaneously, in their threats to human health. Such threats occur, furthermore, through exposure to low concentrations of environmental agents over long periods of time and call for action on the basis of sound presumptive evidence well before overt disease is established.