Which architectural product innovation was first developed by architect William McDonough and chemist Michael Braungart as part of their 'Cradle to Cradle' design philosophy?

Test your knowledge about groundbreaking architectural product innovations that have transformed building design and construction! This trivia focuses on revolutionary materials or technologies that changed how architects approach their projects. Even established professionals might find this challenging, as it explores a specific product innovation that dramatically impacted sustainable architectural practices.

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Self-healing concrete
Cradle to Cradle Certified™ building materials
Electrochromic smart glass
Cross-laminated timber (CLT)