Photos: Earth Hour around the world
Earth Hour
Credit: Getty Images
BEIJING, CHINA - MARCH 31: Badaling Great Wall after turn off the lights during the Earth Hour 2012 power switch off on March 31, 2012 in Beijing, China. About 124 Chinese cities joined a WWF worldwide initiative Earth Hour, to call on people to switch off unnecessary lights for one hour tonight, in support for energy-saving efforts and global warming prevention as a shared responsibility.(Photo by Lintao Zhang/Getty Images)
