theoretical purpose, but also a practical one of how to implement sustainable practices in building and the economy. An important sub-theme that I feel has great implications for education and strategy is the role of information and knowledge in the transition to a sustainable society. The nature of ecological production is knowledge-intensive. Information about building materials, about green production, about community needs, and about natural process is central in a transition to sustainability. Our values are very connected to our knowledge of the world we live in, and our knowledge of possibilities and potentials. Chapter II will begin therefore with this relationship to the fore, looking at the evaluation of building materials, and all that that entails. Then we can begin to look closer at production, consumption, recycling and regulation of materials.