presentation of the principles of ecology and illustrate their relation to today's environmental issues. Far-reaching in its coverage, the fourth edition provides the most up-to-date information with a new chapter on global warming and deforestation. It also focuses on ecology as a science, providing the basic background information needed to show the relevance of studying environmental problems on a global scale. A new supplement package-including an Instructor's Manual, printed and computerized test banks, and a four-color transparency acetate set-further strengthens the fourth edition as an excellent teaching tool for non-majors ecology courses.

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