Celebration of annual Earth Hour campaign held across world

Source: Xinhua| 2018-03-25 07:58:43|Editor: Jiaxin
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GREECE-ATHENS-EARTH HOUR

The Acropolis of Athens is pictured with lights off during the Earth Hour event in Athens, Greece, on March 24, 2018. (Xinhua/Lefteris Partsalis)

KEY WORDS: Earth Hour campaign
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