Hand on heart – the construction industry is a real climate killer. It produces more CO2 than most other technical industries. Therefore, something needs to change urgently! A possible alternative to conventional concrete structures is the use of clay. Houses have been built and expanded using this method for thousands of years. Nevertheless, something has been forgotten. Today, clay builder Stephan Egginger is our guest, and we are curious as to what he can tell us about this fascinating building material!