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The Singapore city-skyline is seen in darkness against the lit highway as lights in major buildings around the financial district are switched off for a whole hour on Saturday, March 23, 2013 in Singapore. More than 100 buildings, locations and organizations in Singapore switched off their lights as part of the global Earth Hour initiative by World Wide Fund for Nature (WWF) along with other national monuments around the world. (Photo by Wong Maye-E/AP Photo)
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