Material reuse has been a wildly popular trend in sustainable architecture over the last decade. Using old materials and giving them a new life in a building not only keeps those materials from wasting away in a landfill, but also adds a considerable amount of character to the finished project. Architect Alejandro Bahamón and artist Maria Camila Sanjinés were fascinated by the use of waste in architecture and decided to document 33 projects from around the world that extensively utilize a wasted material in their new book, REMATERIAL From Waste to Architecture. We had a chance to catch up with Alejandro Bahamón about his latest work — read on for our exclusive interview!