They call their approach natural capitalism because it's based on the principle that business can be good for the environment. For instance, Interface of Atlanta doubled revenues and employment and tripled profits by creating an environmentally friendly system of recycling floor coverings for businesses. The authors also describe how the next generation of cars is closer than we might think. Manufacturers are already perfecting vehicles that are ultralight, aerodynamic, and fueled by hybrid gas-electric systems. If natural capitalism continues to blossom, so much money and resources will be saved that societies will be able to focus on issues such as housing, contend Hawken, author of a book and PBS series called Growing a Business, and the Lovinses, who cofounded and directed the Rocky Mountain Institute, an environmental think tank. The book is a fascinating and provocative read for public-policy makers, as well as environmentalists and capitalists alike. --Dan Ring