The combined photo shows a community before (above) and after tuning off lights (middle) and volunteers play with cellphone lights during the Earth Hour campaign in Qinhuangdao, north China's Hebei Province, March 25, 2017. (Xinhua/Yang Shiyao)
The combined photo shows the China Central Television Tower before (L) and after tuning off lights during the Earth Hour campaign in Beijing, capital of China, March 25, 2017. (Xinhua/Tao Xiyi)
The combined photo shows the China Central Television Tower before (above) and after tuning off lights during the Earth Hour campaign in Beijing, capital of China, March 25, 2017. (Xinhua/Tao Xiyi)
The combined photo shows the buildings and a bridge before (above) and after tuning off lights during the Earth Hour campaign in Macao, south China, March 25, 2017. (Xinhua/Cheong Kam Ka)
The combined photo shows buildings in Xinjiekou before (above) and after tuning off lights during the Earth Hour campaign in Nanjing, capital of east China's Jiangsu Province, March 25, 2017. (Xinhua/Sun Can)
