Which architectural project was the first to achieve the Living Building Challenge certification, considered the most rigorous sustainability standard requiring net-positive energy and water usage?

Sustainable design has transformed modern architecture, with certain projects leading the way in environmental innovation. This poll tests your knowledge of landmark sustainable architectural achievements that have redefined how we approach building design with ecological considerations. These pioneering projects have influenced industry standards and practices for green building across the globe.

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The Bullitt Center in Seattle (2013)
The Edge in Amsterdam (2014)
One Angel Square in Manchester (2013)
The Crystal in London (2012)