The Christian Doppler Laboratory for Anthropogenic Resources at the Vienna University of Technology, led by Johann Fellner, organized a high-level symposium on „Mining the Technosphere: Potentials and Challenges, Drivers and Barriers“. More than 100 delegates discussed 40 presentations and posters on the exploration, evaluation, assessment, and retrieval of secondary resources from anthropogenic stocks and flows. For a web stream of the closing panel discussion „Drivers and Barriers for Closing Material Cycles“ please click here.