The Empire State Building, the most iconic skyscraper in America, became the tallest building to receive LEED Gold certification for existing buildings by the U.S. Green Building Council. The 2.85 million square foot office tower and tourist attraction celebrating its 80th birthday engaged in a more than two-year overhaul costing a total of $500 million dollars, including $100 million dollars to achieve the certification. A study determined that the significant investment was actually low for the number of square feet in the building. read more…