| The people of the earth have been living and developing in a natural way by engaging in various productive activities appropriate to the natural environment peculiar to the respective regions where they reside. On the other hand, it is well known that the environmental problems which have been brought about by remarkable industrial development, sharp increase in population, and highly substantial civilization in recent times are becoming so serious that the existence of the human race is being threatened. One of the practical measures that the human race should take to "preserve a good environment" is to "maintain the diversities of nature and human activity, both of which are peculiar to each region, and to search for and establish solutions for coping with productive activities and living affairs". |
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