Stefan Salhofer is associate professor at University of Natural Resources and Life Sciences Vienna, Institute of Waste Management. His research is to analyse products in a life cycle perspective. A focus is set on the end-of-life stage, where take back, pre-treatment (e.g. dismantling) and the final treatment as recycling or disposal take place. Beyond treatment options also the extension of the use phase (by re-use, repair) are developed and analysed. Products which have been analysed are electronics, batteries and plastic packaging, as long-term products also buildings and constructions are analysed.