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International audience; The subject of light pollution is presented in a context of changes in society concerning the use of artificial light, making the link with current environmental problems. This article focuses on the emergence, definition and different translations of light pollution in society, in order to understand the role and place of communication in its construction.; Le sujet de la pollution lumineuse se présente dans un contexte de changements au sein de la société concernant l'utilisation de la lumière artificielle, en faisant le lien avec des problèmes environnementaux actuels. Cet article s'intéresse à l'émergence, à la définition et aux différentes traductions de la pollution lumineuse au sein de la société, dans le but de comprendre le rôle et la place de la communication dans sa construction.

Plus de 8 millions de décès surviennent chaque année prématurément dans le monde en raison des particules fines émises par la consommation de combustibles fossiles. La combustion de ces ressources conduit également à de fortes émissions de CO2, responsables du réchauffement climatique, nul besoin de le rappeler. Ce n’est cependant pas le cas de la nécessaire et urgente transformation de nos sociétés dont les rappels ne cessent, pendant que la consommation énergétique et notamment des énergies fossiles continuent d’augmenter malgré les conséquences bien établies en matière de réchauffement climatique. La récente sortie du dernier volet du 6e rapport du GIEC, celui du 3e groupe de travail dédié aux solutions, paru le 4 avril, rappelle ainsi de nouveau l’urgence de mettre en place des actions drastiques et ambitieuses de transformation de nos sociétés car au rythme actuel des émissions de gaz à effet de serre, le seuil des 1.5°C sera atteint en 2030. Ce défi de notre temps de limiter à 1.5°C par rapport à l’ère préindustrielle le réchauffement planétaire n'est pas impossible, mais il nécessite des transitions rapides, profondes et sans précédent dans tous les aspects de la société. Il faut agir maintenant et dans la continuité.

International audience; Energy consumption is a serious environmental issue due to global warming and pollution. Public policies are developed in this context. Behavioral economics pays particular attention to the use of nudges. A nudge is a form of policy aimed at changing individual behaviors without using financial incentives or order, for example by providing information to individuals so as to conduct behaviors in the direction desired by the policy-maker. Interestingly “private nudges” can be imagined for companies. Many economists and psychologists have studied the impact of nudges on households’ proenvironmental behaviors. Yet, studies focusing on nudging employees’ energy use are rare. The objective of our paper is precisely to test the effect of 3 nudges on employees’ energy consumption with the help of a field experiment. The first nudge alerts individuals on good energy consumption practices. The second one stresses the responsible use of energy regarding environmental stakes. Finally, a “social comparison” nudge is used informing employees on others’ energy consumption in firms participating to the experiment. The field experiment is conducted with 50 French companies’ sites. These companies are equipped with “Building Management System”, allowing obtaining a daily electricity consumption. The experiment is conducted over 12. The data collected are subjected to statistical and econometric processing allowing us determining the impact of the various nudges tested.

International audience; Residential and tertiary buildings in France consume 46% of the global final energy (2017) and are responsible for 30% of all energy related carbon dioxide emissions (2016) (CGDD, 2019). However, even if this represents an important potential of energy consumption reduction, this potential is not totally exploited and the building sector remains a silent consumer. With the development of Internet of Things and the integration of Big Data and sensors in many fields of daily life, there is an important need to develop intelligent approaches in order to create sustainable environments where less energy is consumed while responding to comfort needs. Hence, more and more importance is nowadays given to the industrial and academic issue of using the potential of digital solutions in order to make buildings more energy efficient from design to operation phase. The development and the use of simulation tools aimed to help designers predict the energy consumption and performance of the building. However, recent researches and experiences have shown a considerable gap between predicted energy consumptions and real ones, and occupant behaviour is now essentially recognized as the main responsible of this disparity (Darakdjian et al., 2018) (Vorger, 2015). The interaction between users and buildings, occupant presence and the adaptive actions they may have to maintain their comfort can make energy consumption five times higher than what was predicted (IPEEC Building Energy Efficiency Taskgroup, 2019). Thus, occupant behaviour must be well understood and modelled in a more accurate way in order to identify its impact on energy consumption. This will help identifying the adequate energy saving recommendations and turn occupants from consumers to active users of energy in buildings.

International audience