Sustainability encompasses an ecological, a social and an economic dimension. New strategies and new ways of solving problems in all areas of society, whether of a technological or non-technological nature, will not only influence the ecological and the economic environment, but also the social environment. If the potential social impacts of such strategies and solutions are ignored, their successful implementation may be at risk due to a lack of general public acceptance. Therefore new methods using transdisciplinary approaches are needed to take the social dimension into account for decision-making and planning.