Around 2009-2010, the Empire State Building was undergoing a $550 million renovation, with $120 million spent in an effort to transform the building into a more energy efficient and eco-friendly structure [REF].
In July 2014, the San Francisco 49ers' Levi's Stadium in San Francisco became the first venue in the United States to earn a LEED Gold certification, setting the bar and expectations for future NFL stadiums.