going green

Empire State Building Green-ified

A view of the Empire State Building and One World Trade Center (R-rear) as seen from the Top of the Rock Observation Deck at Rockefeller Center April 30, 2012.
A view of the Empire State Building and One World Trade Center (R-rear) as seen from the Top of the Rock Observation Deck at Rockefeller Center April 30, 2012. The Port Authority of New York and New Jersey held at a press conference today to mark the milestone of One World Trade Center becoming the tallest building in New York. New York's skyline got a new king Tuesday after the still unfinished World Trade Center tower, built to replace the destroyed Twin Towers, crept above the venerable Empire State Building. Workers gently maneuvered a steel column into its base atop the skyscraper's skeletal top, bringing the total height to just beyond the 1,250 feet (381 meters) of the Empire State Building's observation deck.

New York’s (second) tallest building is now one of its ecofriendliest, thanks to a half-billion-dollar retrofit that will save tenants an estimated $4.4 million a year on their energy bills. Apart from 6,500 better-insulated windows, the Empire State Building also installed 25,000 sensors for tenants to monitor their energy use more closely. 

Empire State Building Green-ified