The creation of economic opportunities through the promotion and development of the Mediterranean circular economy is the essence of CLUSTER4GREEN. In a vast part of the region, the leverage potential of circular economy is still lagging, deeply affecting the capacity of green sectors to generate wealth and jobs. CLUSTER4GREEN will take on the legacy of several previous projects that paved the way for the adoption of sustainable models of development, based on the circular concept, in industries like textile, building or smart cities.