Abstract
Within a decade, concern for the environment has become a significant social and political force around the globe. Chlorofluorocarbons and acid rains are not restricted by frontiers. The environmental problems we share with the rest of the world—finite supplies of land, clean water and air, and the cost of their destruction— mandate a recognition of our mutual vulnerability and a redefinition of concepts to focus more specifically on quality of life. The cost can only increase if we delay.
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