It isn’t easy to add luster to a structure that’s already a star. 102 stories high and 81 years old, New York’s Empire State Building has already been hit by an airplane (in 1945) and stormed by a giant gorilla (in the movie King Kong). Now, thanks to Skanska’s new flagship office, it’s also a little greener. The new space boasts sophisticated fresh air ventilation, non-toxic materials and natural light in every office. And it adds one more to the building’s many distinctions, its first LEED certified platinum interior.