Normal breathing indoors and outside may also involve inhaling PCBs, soot, ozone, formaldehyde, radon, radiation, or asbestos fibrils, among other substances. This book is important reading for everyone who wants to know how air quality relates to health and how it can be improved in their personal environments.

Beatrice Trum Hunter has written more than 30 books on food issues, including whole foods, food adulteration, and aditives. Her most recent books include The Whole Foods Primer, Probiotic Foods for Good Health, and Infectious Connections.