Pittsburgh Is “Emerald City” with Dozens of Energy-Efficient Buildings from Imagine Pittsburgh
"There’s more than meets the eye to the buildings that dot Pittsburgh’s picturesque skyline and populate its neighborhoods. Many of them — 83 to be exact — are Leadership in Energy and Environmental Design (LEED) certified-structures commonly called “green buildings” because their design, materials and operations are easy on the environment and energy usage. Fact:  Pittsburgh – once notoriously tagged “hell with the lid off” because of its environmental pollution– registered three of the first 12 LEED structures in the United States. Fast-forward to today when some 75 percent of new buildings in the city are pursuing LEED certification."