Sun, 24 Mar 2013 04:30:00 GMT
World switches off lights to raise awareness about climate change: Pictures

Millions of people around the world switched off lights for Earth Hour on March 23, in a global effort to raise awareness about climate change. Since it began in Sydney in 2007, Earth Hour has grown to become what environmental group WWF says is the world's largest demonstration of support for action on carbon pollution

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South Korean students hold an Earth Hour LED display during the 7th annual Earth Hour in Seoul, South Korea  

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