Candles are lit up on an earth-shaped cake as to signal the Earth Hour campaign at a hotel in Doha, capital of Qatar, March 19, 2016. (Photo: Xinhua/Meng Tao)
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Candles are lit up on an earth-shaped cake as to signal the Earth Hour campaign at a hotel in Doha, capital of Qatar, March 19, 2016. (Photo: Xinhua/Meng Tao)
