Combo photo taken on Dec. 15, 2014 shows a giant Christmas tree on the lake of Rodrigo de Freitas in Rio de Janeiro, Brazil, on Dec. 15, 2014. The giant tree, which is 85 meters tall and installed with about 3.1 million micro LED bulbs, is lit every year before Christmas. The theme of the tree this year is "A Christmas of Light". (Xinhua/Xu Zijian)
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