Which unique requirement must a building meet to achieve full 'Living Building' certification under the Living Building Challenge?

The Living Building Challenge (LBC) is one of the most rigorous sustainability certification programs for buildings in the world. It goes beyond traditional green building standards by requiring buildings to be regenerative rather than merely sustainable. Test your knowledge about this revolutionary architectural certification program that's changing how we think about sustainable design and construction.

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It must generate 105% of its energy needs through renewable sources (net positive energy)
It must be net-zero water, producing all its water and processing all waste on site
It must have operated for at least 12 consecutive months proving all performance requirements
It must be constructed using only materials sourced within 500 miles of the building site