"Double hybrid structure - the Regional Innovation Center for Energy Technology at the Offenburg University of Applied Sciences seems rather simple at first glance. Behind the wooden cladding made of silver fir, which is typical of the Black Forest, hides a reinforced concrete-wood hybrid construction, in which a conscious decision was made as to where which material was ecological and is used in an economically sustainable way ", writes Nina Greve in DBZ 02/21" Hybrid structure".