Using methodological and applied research to thoroughly understand the population behaviour and opinions on environmental issues, the main purpose of this project is to build knowledge in order to better understand public and major groups participation in the design and application of instruments in environmental politics (for example by designing effective tools to modify consumption patterns). This project, funded by the Prime minister's Services (Belgian Federal Office for Scientific, Technical and Cultural Affairs), is carried out in collaboration with the F.U.L. (University of the Province of Luxembourg).