The "ZIN" project, developed by "Befimmo" and"Open Minds", consists of the renovation of towers 1 and 2 of the Brussels World Trade Center. At the end of the project, the multifunctional space of the ZIN will accommodate offices, co-working spaces, housing and hotel services on 110,000 m². One of the strong ambitions of this project has been to integrate the concept of circular economy, through the inventory and reuse of a maximum of materials as well as the "Cradle to Cradle" certification.  A major part of the existing materials will be either retained,reused on other sites or recycled. Drees & Sommer supports this project with Cradle to Cradle consulting.