The 16th symposium of the Association de la maîtrise en environnement de l’Université de Sherbrooke (AMEUS) was a major annual environmental event in Quebec. Held last February 28 under the theme Énergie: efficacité et durabilité (energy: efficiency and durability), the symposium attracted more than 250 environment professionals from across Quebec and from many fields including industrial, municipal, governmental and university. Among other things, the symposium, which was set up with brio by the student members of AMEUS, gave lecturers an opportunity to present and defend concrete experiences and various forms of energy available on the market now and in the near future. Finding its roots in the ratification of the Kyoto Protocol by the Canadian Prime Minister, the symposium had two precise objectives: to modify the use of energy so as to make it more respectful of the environment and to explain the importance of producing and using energy which is in keeping with sustainable development in order to guarantee its durability.