Università degli Studi di Catania Dipartimento di Architettura STARTING FROM THE RIVER AGAIN COMMUNITY PROCESSES TO REGENERATE SPOILED ECOSYSTEMS Giusy Pappalardo Dissertation -­‐ Degree of Doctor of Philosophy in the subject of Regional and Environmental Planning and Design XXVI Cycle PhD Program Coordinator Advisor: FilippoGravagno, PhD Prof. Francesco Martinico, PhD Co-­‐Advisor: Laura Saija, PhD December 2013