This explanation of ecology, written specifically for nonscientists emphasizes the relationships of living things and their environment and the delicate balance of natural ecosystems

Examines the problem of disappearing species and analyzes the causes of the accelerated rate of extinction and what can be done to halt the trend

Provides documented information on all aspects of the population-food-environment crisis

Projects the effects of the scarcity of natural resources on American relations and provides the individual with suggestions for adopting a new life-style

An authoritative study of the overpopulation crisis which proposes rational alternatives to preserve the environment and the human race

Product Description: From the Preface.. "In the three years since Population, Resources, Environment was first published, a need for a less detailed and comprehensive introduction to human ecology has become apparent. A survey of potential users indicates that a short treatment of the subject, focusing on the biological and physical aspects of man's present problems and on the ways that they can be solved, would be useful in many courses and for many readers...read more

Biological background for the study of butterflies precede an illustrated list of North American specimens and their characteristics