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P.J.Wyllie(Division of Geological and Planetary Sciences,California Institute of Technology,Pasadena,CA 91125)  
This paper elucidates the close relationship between the earth sciences and soci-ety,and also between the basic and applied aspects of the former.The author concludesthat human activities are not only affected by. but they have significant effects on the envi-ronment.Human society is part of earthly cycles,obtains resources from them,and nowcauses significant perturbations of them. We need global understanding to ensure that so-ciety’s aggressive attack does not disrupt the protective wrapping of fluid envelopes andsoil.Such research is a good investment for society.
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