Workers install LED lights on the horn-shakped "Sunny Valley" building of Expo Axis in Shanghai, east China, December 4, 2009. A great amount of energy saving equipments were employed in the construction of 2010 Shanghai World Expo. [Xinhua]

Photo taken on November 14, 2009 shows the horn-shakped "Sunny Valley" building of Expo Axis in Shanghai, east China. A great amount of energy saving equipments were employed in the construction of 2010 Shanghai World Expo.  [Xinhua]