People ride in darkness in a capsule of the Singapore Flyer as 

People ride in darkness in a capsule of the Singapore Flyer as the lights 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. (AP Photo/Wong Maye-E)
Associated Press
People ride in darkness in a capsule of the Singapore Flyer as the lights 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. (AP Photo/Wong Maye-E)
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