This document discusses design for recycling (DfR) and closing material loops through industrial ecology approaches. It outlines goals of sustainability and avoiding pollution by designing products and systems to be recycled and reused. Key points covered include taking back legislation in Europe requiring manufacturers to recycle products, recycling targets for cars and electronics, and techniques for separating and recycling different types of plastics and other materials. The importance of design for recyclability and using fewer incompatible materials is emphasized to enable more effective recycling.