The background to philosophical interest in environmental values was established by a number of popular works written by scientists such as R. Carson, Silent Spring, D. H. Meadows et al., The Limits to Growth. Taylors work on respect for nature has not been the subject of detailed discussion in the literature, in part because it is so highly developed and sophisticated, and was developed with an eye to consistency. A clear introduction to the Kantian ethical framework is in J. ONeill, Ecology, Policy and Politics. It argues that environmental economics fails as a science of valuation because preference satisfaction, its normative basis, has no relation to any value not trivially defined in terms of it. Positive aesthetics is argued strongly for in E. Hargrove, Foundations of Environmental Ethics and a thorough treatment of environmental aesthetics is in E. Brady, Aesthetics of the Natural Environment.