This volume represents a first attempt at holistically classifying and mapping ecological regions across all three countries of the North American continent. A common analytical methodology is used to examine North American ecology at multiple scales, from large continental ecosystems to subdivisions of these that correlate more detailed physical and biological settings with human activities on two levels of successively smaller units. The volume begins with an overview of North America from an ecological perspective, concepts of ecological regionalization. This is followed by descriptions of the 15 broad ecological regions, including information on physical and biological setting and human activities. The final section presents case studies in applications of the ecological characterization methodology to environmental issues. The appendix includes a list of common and scientific names of selected species characteristic of the ecological regions.

Summaries of the major features of the geology of North America and the adjacent oceanic regions are presented in 20 chapters. Topics covered include concise reviews of current thinking about Precambrian basement, Phanerozoic orogens, cratonic basins, passive-margin geology of the Atlantic and Gulf Coast regions, marine and terrestrial geology of the Caribbean region and economic geology.

Germán Vergara explains how, when, and why fossil fuels (oil, coal, and natural gas) became the basis of Mexican society.

This is a book about the biological conquest of the New World. Taking as a case study the sixteenth-century history of a region of highland central Mexico, it shows how the environmental and social changes brought about by the introduction of Old World species aided European expansion. The book spells out in detail the environmental changes associated with the introduction of Old World grazing animals into New World ecosystems, demonstrates how these changes enabled the Spanish takeover of land, and explains how environmental changes shaped the colonial societies.