Which architectural product innovation, first commercially used in the 1980s, allowed for curved glass facades and significantly improved thermal performance in skyscrapers?

Test your knowledge about revolutionary product innovations that changed architectural design practices! This trivia question focuses on a groundbreaking material technology that transformed how architects approach building exteriors and energy efficiency. Can you identify the correct innovation from its origin story?

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Low-E Glass (Low-emissivity glass)
ETFE (Ethylene tetrafluoroethylene) membrane systems
Self-healing concrete
Electrochromic smart windows