Beyond the notion of ecology (the least impact on the environment), here is a book that shed light on the habitat SANITATION: the slightest impact on the health of residents. Scientific but easy to access, it gives straightforward benefits and health disadvantage of virtually all materials and construction techniques: What are the dangers of glass wool, asbestos, pvc? Wood, hemp, cellulose they are totally inofensifs? How to build to avoid or minimize natural or human disturbance? ... More than a book: a clear and straightforward guide that brings together all the information necessary for a healthy habitat.