In its brochure "Protecting natural resources by creating material cycles  in the construction sector ", the Commission for Sustainable Construction Agency (KNBau) explains how material cycles in the construction sector can be better implemented. The KNBau identifies two fields of action: the recovery of secondary raw materials from existing structures and the planning of resource-conserving structures recyclable in the future. Among other things, it recommends to the public sector how to achieve high recycling rates for construction and demolition waste -  by supporting innovative technologies and by promoting the acceptance among construction specialists, e.g. through further training courses.