Green Wall Systems Façades become more advanced and sophisticated, and there is much scope for innovation: Urban heating, loss of biodiversity, and scarcity of drinking water are among the big challenges imposed on mankind by climate change. Together with the ZHAW Zurich University of Applied Sciences, Switzerland, Sika started a project for developing a modular green wall system that is intended to solve these challenges all at once. The project is funded by the Swiss Innovation Agency, Innosuisse.