Environmental impact of materials: circular economy and sustainable management of materials Groupe PSA is involved in a large number of scientific partnerships to boost the development of the biomaterials industry and expand the use of these materials in vehicles: ■ through the Regional Association of the Automotive Industry of Île-de-France, Groupe PSA is a partner of the BIOMass for the future/Miscanthus project alongside the INRA (French National Institute for Agricultural Research).