Which famous architect launched the revolutionary 'Heliotrope' in 1994, the world's first building designed to generate more energy than it uses?

In the world of architecture, some product launches transform the industry and how we design buildings. This trivia question focuses on a groundbreaking product introduction that changed how architects approach sustainable design. Test your knowledge of architectural product history and the visionaries behind these innovations that shaped our built environment.

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Rolf Disch
Norman Foster
Zaha Hadid
Rem Koolhaas