“These are sensational pilot projects,” says Berlin architect Olaf Grawert, partner at B+ Architecture. “But unfortunately everyday real estate management looks different. Renovations, renovations and further construction In the existence are still the exception, instead the entire industry is fixed for demolition and new construction-even though we have long known what is for catastrophic ecological and climatic consequences. “38 percent of global CO2 emissions are due to the building sector. In addition: Household waste only makes up eight percent of the EU waste mountains.