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A team of World Wildlife Fund (WWF) members pose with the Acropolis of Athens during the Earth Hour event in Athens, Greece, on March 24, 2018. (Xinhua/Lefteris Partsalis)
A team of World Wildlife Fund (WWF) members pose with the Acropolis of Athens during the Earth Hour event in Athens, Greece, on March 24, 2018. (Xinhua/Lefteris Partsalis)