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Focuses on the political controversies concerning the efforts of a mounting crusade to preserve vast unspoiled tracts of Federal lands in the U.S. Definition of wilderness under a bill proposed by the U.S. Senate's Committee on Interior and Insular Affairs; Claims of the settlers on the rights to the lands; Arguments of industries depending on forest products on the efforts of the crusade.

Discusses the economic aspects of pollution. Application of marginalism to questions of pollution; Effects of the divergence between private and social costs on pollution; Use of an economic approach in pollution control; Efficacy of a price or penalty system in controlling pollution.