You may not have realized it, but it's been determined that half of all illness is caused by poor indoor air quality. So, if you're at all concerned about your family's health, and plan to repaint a bedroom, replace floor covering, put on a room addition, or even build a new house, you need The Healthy House! Without it you could easily have health-care costs that are hundreds of times higher than the cost of the book, which is now a classic among health-conscious builders and remodelers.