A committee of the World Health Organization estimates that as many as 1 out of 3 new or remodelled buildings may have ``sick building'' problems. Offers concrete solutions and step-by-step actions that readers can take to create a healthier environment in their homes. Coverage includes all major areas of house or apartment pollution such as asbestos, lead paint, radon, gas fumes, carbon monoxide, household chemicals, water problems, allergies, cigarette smoke and much more.