Waste management strategies and technologies are currently undergoing rapid development. The sardinia Symposia were established in order to make knowledge and experiences in this field readily available. The Symposia have since become an acknowledged Reference Forum where leading experst meet and discuss new concepts and technologies. The Eleventh Sympsoium will be held in OCtober 2007 and marke the twentieth annivesary. The Symposium will focus on innovative aspects of Waste management, presenting new technologies, describing the state of the art and related case studies, discussing the main controversial issues and sharing experiences from different countries. The Symposium will include 8 oral sessions, poster sessions, workshops and training courses.