The newly released Sustainability Paper 3 published by the Chamber of Architects and Town Planners of Hessen is dedicated to these questions and discusses with experts from practice and research their experiences in establishing a circular economy.

Martin Haas and Robert Lotz were interviewed by Gertrude Peters on the topic of "Rethinking project development: from linearity to cycles". Project development in the context of circular planning and building is currently still associated with many imponderables - from liability to planning effort to acceptance. But how can thinking in cycles be better integrated into planning and construction today? Which accustomed standards must be abandoned in order to achieve the goals of climate adaptation?