Which product innovation, introduced in the early 2000s, revolutionized sustainable architecture by allowing buildings to generate electricity while serving as a design element?

Test your knowledge about a groundbreaking sustainable product innovation that transformed architectural design practices in the 21st century. This innovation addressed one of architecture's biggest environmental challenges while creating new aesthetic possibilities. How well do you know the products that have shaped modern sustainable architecture?

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Building-integrated photovoltaics (BIPV)
Thermochromic glass facades
Self-healing concrete
Graphene structural composites