The Wall Street Journal reports on the biking power that is lighting Copenhagen's Christmas tree.At the Danish capital’s City Hall Square, 15 to 20 volunteers can sit on stationary bikes located around a massive, decorated tree and pedal away to keep it light, at least during the day. The bikes are connected to electrical tie-ups that ultimately power hundreds of lights on the tree.Read the full story: Pedal power
Photo by AFP / Getty Images
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