IJ 



vantages for recreation that they afford — and the automobile 



with the improved highways has opened the door to thousands 



who never before were able to appreciate the beauties of nature. 



This for lack of a better name we may designate as the esthetic 



value of nature, and I think few persons will deny that in the 

 long run it works for our good. 



There is another aspect of the situation, one which borders on 

 the economic. It is based on the fundamental and well-known 

 fact that all of the elements of nature are closely interwoven and 

 interdependent and that the loss of even a part of one entails the 



