• Green building certification systems working together: how the LBC influenced LEED v4

    The Living Building Challenge is probably the most stringent green building certification program currently in existence, and includes performance-driven targets that actually give back to the world, rather than just trying to stay neutral or low-energy. The LBC has only 20 'imperatives' to meet, divided into 7 categories, or "Petals". To achieve full Living Building Challenge certification, all 20 imperatives must be met, but there are lower levels of certification like "Petal Certification", where all the imperatives in 3 categories are met. 
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