↑"Closing the loop of the non-stony fraction is another central aspect of the programme. Economic and logistic aspects represent important constraints for closing the loop of non-stony materials. Producer responsibility schemes are seen as a possibility to stimulate the development of a logistical chain for end-life materials. It could also boost the efforts for improved design of non-stony construction materials. Selective demolition is also considered as a precondition for closing this loop." + document also mentions "niet-steenachtige …" in various Flemish/Belgian links (https://ec.europa.eu/environment/pdf/waste/studies/deliverables/CDW_Belgium_Factsheet_Final.pdf)