substances that have spawned epidemic levels of chemical sensitivity and building sickness. To really implement sustainable building, the codes should be grounded in lifecycle assessment (LCA) and encourage the use of regional natural materials. Many of these materials, described in Chapter V, exist in the public domain, and because of their very availability they have not spawned a powerful profit-making industry to lobby for their use. They fail to attract the kind of investment needed to pay for expensive research and testing. But recently, the insurance industrywhich historically was a major catalyst for the development of building codeshas begun to pay closer attention to climate change and the role of the building industry in causing it (Berz, 2004). It has also become aware of the pervasiveness of building sickness, and its impact on both health system costs and worker productivity. Organizations like the Arizona-based Development Center for Appropriate Technology (DCAT) have begun to form alliances of regulators, realtors, inspectors, builders, and designers, to support research and testing of nonindustrial low-impact materials, and also to carry on education with those parties on the total impacts of building codes. DCAT director David Eisenberg argues that, in the US, anyone can propose changes to the building codes and that the green building movement must be involved in building code transformation.