NEW YORK -- Lowering the energy consumption of the Empire State Building may seem bold and significant -- and it is. But the real challenge lies among the city's lesser-known buildings that extend into the horizon, to the north and south and in adjacent boroughs. Unless New York can lower its $15 billion annual energy bill and show the world that there are successful ways to reduce greenhouse gas emissions, it could find itself teetering on the edge of disaster indefinitely. Go to story #1