Brussels' city hall at the Grote Markt is shown before and after the lights were switched off for five minutes on Feb. 1, 2007. The action, called "Five Minutes of Respite for the Planet," was part of a campaign to draw the attention of citizens about the waste of energy and the issue of global warming. Brussels was one of several European cities that staged symbolic blackouts to coincide with those in Paris.
(Photo: BENOIT DOPPAGNE/AFP/Getty Images)
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