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The combo photo taken on March 24, 2018 shows the world's tallest building Burj Khalifa before (up) and after the lights are dimmed during the Earth Hour event in Dubai, United Arab Emirates (UAE). (Xinhua/Mahmoud Khaled)
Celebration of annual Earth Hour campaign held across world
Source: Xinhua| 2018-03-25 07:58:43|Editor: Jiaxin
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