During the 18th Ecomondo International Fair in Rimini, ENEA and University of Tuscia took the opportunity to submit to visitors a survey with two different types of questionnaires on industrial symbiosis. As the industrial symbiosis and the circular economy are topics of today’s interest and importance and ENEA itself is implementing projects on these topics, the survey had a double purpose:  assess, through a basic questionnaire, the level of awareness on industrial symbiosis and circular economy of people visiting Ecomondo (questionnaire proposed by ENEA stand); - assess, through a more complex questionnaire proposed to participant to the conference “The industrial symbiosis between theory and practice”; aim of this more complex questionnaire was ask participants their opinion on main issues influencing the possibility to realize actual synergies between companies according to industrial symbiosis strategy.