After three years of fruitful cooperation, the European projectCIE - Cleantech Incubation Europe, financed by the Interreg IVC Programme and aiming at identifying policies able to trigger and accelerate the economic growth in the field of clean technologies, came to its end. The results of such a long and thorough confrontation among partners were described and synthesized in the useful handbook “Cleantech Incubation: Policy and Practices”.