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Think it's only West Coast buildings that have taken on the deep-green challenge posed by the Cascadia Green Building Council's Living Buildings Challenge? Think again. Pittsburgh's Phipps Conservatory has risen to the occasion in style with its Center for Sustainable Landscapes, widely believed to be one of the most sustainable buildings in the world. You name it, this building's got it: solar power, wind power and a heavy duty thermal efficiency. Most notably, however, the building takes an “Outside-In, Passive-First” approach to heating and cooling that relies on geothermal wells tied to a heat pump system only after two other, less energy intensive systems have reached their max capacities.










