From A to Z in the Art World.
Empire State Building, New York

Photograph by Joe McNally, National Geographic
In the city that never sleeps a new awareness about  energy means the Empire State Building now uses bright lights at night  only to celebrate holidays and special events. And power-hungry  Manhattan has generating potential of its own: A tidal-energy project  under development in the swift-flowing East River could power a thousand  homes.

Empire State Building, New York

Photograph by Joe McNally, National Geographic

In the city that never sleeps a new awareness about energy means the Empire State Building now uses bright lights at night only to celebrate holidays and special events. And power-hungry Manhattan has generating potential of its own: A tidal-energy project under development in the swift-flowing East River could power a thousand homes.