This combo image shows the Parthenon temple standing atop the Acropolis hill 

This combo image shows the Parthenon temple standing atop the Acropolis hill before and after turning off 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. (AP Photo/Kostas Tsironis)
Associated Press
This combo image shows the Parthenon temple standing atop the Acropolis hill before and after turning off 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. (AP Photo/Kostas Tsironis)
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