The Earth's biodiversity-the rich variety of life on our planet-is disappearing at an alarming rate. And while many books have focused on the expected ecological consequences, or on the aesthetic, ethical, sociological, or economic dimensions of this loss, Sustaining Life is the first book to

examine the full range of potential threats that diminishing biodiversity poses to human health.

Edited and written by Harvard Medical School physicians Eric Chivian and Aaron Bernstein, along with more than 100 leading scientists who contributed to writing and reviewing the book, Sustaining Life presents a comprehensive--and sobering--view of how human medicines, biomedical research,

the emergence and spread of infectious diseases, and the production of food, both on land and in the oceans, depend on biodiversity. The book's ten chapters cover everything from what biodiversity is and how human activity threatens it to how we as individuals can help conserve the world's richly

varied biota. Seven groups of organisms, some of the most endangered on Earth, provide detailed case studies to illustrate the contributions they have already made to human medicine, and those they are expected to make if we do not drive them to extinction. Drawing on the latest research, but

written in language a general reader can easily follow, Sustaining Life argues that we can no longer see ourselves as separate from the natural world, nor assume that we will not be harmed by its alteration. Our health, as the authors so vividly show, depends on the health of other species and on

the vitality of natural ecosystems.

With a foreword by E.O. Wilson and a prologue by Kofi Annan, and more than 200 poignant color illustrations, Sustaining Life contributes essential perspective to the debate over how humans affect biodiversity and a compelling demonstration of the human health costs.

"In 1992, the Center for Health and the Global Environment at Harvard Medical School agreed to coordinate a massive, international scientific effort under the direction of Nobel Peace Prize-winning scientist and author Chivian (Critical Condition: Human Health and the Environment) to catalog 'what was known about how other species contribute to human health.' The result of that extraordinary collaboration, involving more than 100 contributors, is this thorough volume, an invaluable resource for policy makers and a fascinating exploration for general readers of their hyper-connected biosphere. Species diversity, it turns out, acts as a kind of insurance policy for humans, by buffering stresses to the environment. The 'mosaic of ecosystems' provide 'services' (food, timber, air and water purification, waste decomposition, climate regulation) necessary for life that, due to their complexity and scale, are almost impossible to substitute. Naturally, the system is robust but vulnerable: the vultures of southern Asia, for instance, are threatened with extinction because their natural diet-carrion-has been poisoned with medicine routinely prescribed for livestock and humans. Another 'service' contributed by the ecosystem is the highly useful E. coli bacteria, used in biomedical research to develop new medications and provide insight into Alzheimer's and other diseases. This book represents a landmark addition to our understanding of our ecological heritage, and the importance of preserving it. 175 color illus." Publishers Weekly (Starred Review) (Copyright Reed Business Information, Inc.)

Eric Chivian, M.D., is the Director of the Center for Health and the Global Environment at Harvard Medical School. He shared the 1985 Nobel Peace Prize. He is the lead editor and author of Last Aid: The Medical Dimensions of Nuclear War and Critical Condition: Human Health and the Environment.

Aaron Bernstein, M.D., is a Research Associate at the Center for Health and the Global Environment at Harvard Medical School, and Resident, Boston Combined Residency in Pediatrics, Harvard Medical School/Boston University School of Medicine.