This paper presents several possible approaches to the material-conservation problem the advantages and disadvantages, and the relative gains that might result from one, or combination of a number, of these approaches. For the sake of simplicity, discussion is limited to con¬siderations of raw-material availability only. Other factors of impor¬tance such as those of cost, producibility, and manufacturing capacity, which must inevitably be considered in making final decisions of the optimum approach, are considered outside the scope of this paper.
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