This document summarizes a presentation on applying Cradle to Cradle principles in the built environment. It discusses the Cradle to Cradle framework which includes criteria for buildings, a planning guide, and registry. The criteria define what constitutes a Cradle to Cradle building and covers aspects like healthy materials, biodiversity, energy production, and being deconstructable. The presentation provides examples of Cradle to Cradle goals and roadmaps that projects can declare. It emphasizes defining materials and their pathways to ensure everything functions as a nutrient in technical or biological cycles.