This year’s closing key note speaker of Sarajevo Green Design Festival is architect –planer Ken Yeang. Ken Yeang is one of the leading ecodesigners, theoreticians, and thinkers in the field of green design. His work on the green agenda started in the 70s with his doctoral dissertation for the University of Cambridge on ecological design and planning. Yeang is the author of several books on ecological design, and the design of green skyscrapers including The Skyscraper, Bioclimatically Considered: A Design Primer (1996) published by Wiley-Academy, The Green Skyscraper: The Basis for Designing Sustainable Intensive Buildings (1999) published by Prestel (Germany), Revinventing the Skyscraper: The Vertical Theory of Urban Design (2002) published by Wiley-Academy.