The International Institute for Sustainability Analysis and Strategy (IINAS) is an independent transdisciplinary research organization based in Darmstadt, Germany IINAS is a new player in the research community and a small think tank being part of an extensive international network of scientists both within IINAS, and in many institutes, as well as independent consultants, jointly providing integrated research, analyses and consultancy services in the sustainability domain. The key approaches taken by IINAS are transdisciplinarity and networking, i.e. the emphasis in our research and methodologies is on collaboration with and inclusion of decision-makers in private and public sectors and stakeholders such as NGOs (e.g., IUCN and WWF) . IINAS uses data and modeling, but also applies qualitative analysis, especially regarding social issues, and considers the applicability and implementation of its findings and results as a core quality of success. IINAS works critically on “green” economy issues, especially biomass, renewable energy, and energy efficiency. Sustainable land use and resource-related material flows are key areas of future research.With regard to resource efficiency and material flows, IINAS not only considers supply-side issues but also addresses the demand through sustainable consumption research. IINAS has a focus on European and international issues of sustainability, but also carries out work on national and local levels.