Over the past two decades, the removal of impervious urban surfaces and the reuse of debris have gained growing attention across various disciplines. This book collects perspectives on this topic, ranging from ecological and technical, to design considerations. It showcases research from different fields, policies and legislation in Italy, as well as international and national design experiences addressing desealing and material cycles. Ultimately, it aims to provide valuable insights for technicians and designers, fostering greater interdisciplinary dialogue on an issue that is becoming increasingly relevant for the cities of tomorrow.