Combined photo shows the China's National Stadium before Earth Hour (upper) and during Earth Hour in Beijing, capital of China, March 31, 2012. Main buildings and areas in many cities of China participated in the Earth Hour on Saturday evening. Earth Hour is the world's largest environmental movement which encourages individuals, businesses and communities around the world to turn off their lights for one hour on the last Saturday of March in a bid to raise awareness on climate change. (Xinhua/Zhang Yuwei)
The combined photo shows the Badaling section of the Great Wall before Earth Hour (upper) and during Earth Hour in Beijing, capital of China, March 31, 2012. Main buildings and areas in many cities of China participated in the Earth Hour on Saturday evening. Earth Hour is the world's largest environmental movement which encourages individuals, businesses and communities around the world to turn off their lights for one hour on the last Saturday of March in a bid to raise awareness on climate change. (Xinhua/Gong Lei)
Citizens sign on the promotion board of Earth Hour event at Hezhong Square in Jiujiang City, east China's Jiangxi Province, March 31, 2012. Earth Hour is the world's largest environmental movement which encourages individuals, businesses and communities around the world to turn off their lights for one hour on the last Saturday of March in a bid to raise awareness on climate change. (Xinhua)
People attend an event to mark the "Earth Hour" in Wuhan, central China's Hubei Province, March 31, 2012. Main buildings and areas in many cities of China participated in the Earth Hour campaign on Saturday evening. "Earth Hour" is the world's largest environmental movement which encourages individuals, businesses and communities around the world to turn off their lights for one hour on the last Saturday of March in a bid to raise awareness on climate change. (Xinhua/Hao Tongqian)
