Inside America's greenest skyscraper

The most sustainable thing a designer can do is to make people happier -- less distracted, less needy of solace from GameBoys -- by tapping natural pleasures. One Bryant Park includes low-iron glass of such transparency, boasts Fox, that "when you are in the lobby, you are outside."

Dots on the panels in the office floors, not unlike those on a car windshield, offer the maximum possible daylight without glare. Even if you look over a car wash rather than Central Park, more daylight makes happier workers (and lower electric bills).

NEXT: Keep the building alive.