Lighten Christmas Tree by Bike!
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A boy rides a bicycle to light a Christmas tree in Copenhagen, Denmark, on December 8, 2009. As the host city of international climate talks, Copenhagen set up an eco-friendly Christmas tree, which is powered by bicycle-pedaling. [Xinhua]
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Two girls ride a bicycle to light a Christmas tree in Copenhagen, Denmark, on December 8, 2009. [Xinhua]
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