Creative re-use and adaptation is the first and most important tool with which to combat the negative environmental impacts of resource exploitation and depletion. Our existing buildings and infrastructure are our cultural legacy but they also represent a past investment of money, raw material, and human ingenuity and their value should not be discarded without careful consideration of their potential for repair, retrofit, and revitalization. Design analysis and ingenuity are the means by which we make a circular building economy a reality and prevent the critical resources .