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National parks are a global phenomenon found in more than 120 countries. These parks are as diverse as the physical settings and cultural patterns of the many nations that have established them, yet within each country they serve as part of the cohesiveness that binds people together. Parks reflect-and help create-people's pride and love for their national heritage.

Takes a close-up look at island biogeography, the science of the geographic distribution of life on islands, and its significance in terms of evolution and extinction.

A comprehensive framework for assessing threats to wilderness is described. The framework is represented as a matrix of potential threats and attributes of wilderness character. Cells in the matrix represent the impacts of threats on each attribute. Potential applications of the matrix are described. An application of the matrix to the wildernesses in the Forest Services Northern Region (northern Idaho and Montana) suggests that fire management is the most significant threat to those wildernesses and that aquatic systems are the most threatened wilderness attribute.

National parks are a global phenomenon found in more than 120 countries. These parks are as diverse as the physical settings and cultural patterns of the many nations that have established them, yet within each country they serve as part of the cohesiveness that binds people together. Parks reflect-and help create-people's pride and love for their national heritage.

"A new edition of the analysis of energy use in relation to natural resources, technology, economic development, and demographics, assessing problems of sustainability and solutions. The discussions consider topics in solar energy, manipulating ecosystems for agriculture, the historical uses of human and animal energy, fish and agricultural production, ethanol fuels, and environmental impacts. The revision emphasizes food production systems and their use of land, water, energy, and biological resources, and the planning policy dilemmas facing individuals and nations in terms of providing food and a quality environment for the future. Includes statistical tables." -- Publisher.