As part of the "Mission B" project of the Swiss Radio and Television SRF, an innovative research laboratory is to be installed on a roof area in Leutschenbach in Zurich, where different types of substrate (ricoter, wool, vegetable charcoal, etc.) and vegetation methods are to be studied.This experimental area will be used to demonstrate how new innovative substrate types made of recycled materials (ricoter, wool, vegetable carbon, etc.) can be used in the context of "restoration ecology" and how "grey" unused areas can be developed into biodiverse green spaces.