The environment and building(s): in many respects, it is not a good combination. Hence, here lies a tremendous challenge for designers and the industry to find opportunities for sustainable design. Dr. Ken Yeang, one of the most influential architects in so-called environmental design, will discuss this subject on Wednesday 12 December during the conference ‘Tectonics: making meaning’. His lecture entitled ‘Green Design’ will begin at 11.45 hours in the Blauwe Zaal of the Auditorium.