The Eiffel Tower in Paris stands in darkness, right, after its spotlights were switched off between 7:55 and 8 p.m. on Feb. 1, 2007. The nationwide lights-out was timed before the release of a major climate change report warning that Earth will keep getting warmer. Lights also went out at Paris' Hilton Hotel, where many of the scientists and officials from the Intergovernmental Panel on Climate Change are staying.
(Photo: MEHDI FEDOUACH/AFP/Getty Images)
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