The Parthenon temple stands atop the Acropolis hill after turning off the lights to mark the annual Earth Hour in Athens, on Saturday March 23, 2013. In Greece, floodlights in several monuments and public buildings were switched off for one hour at 8:30 p.m. local time. Thousands of businesses and municipalities also dimmed their lights. (Photo by Kostas Tsironis/AP Photo)
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