1 of 30. A man uses cross-country skis to make his way across the snow-covered Champs de Mars near the Eiffel Tower in Paris January 20, 2013. Several inches of snow fell in the French capital halting some transportation and closing some public parks.

1 of 2. The China Central Television (CCTV) building is seen next to a construction site in heavy haze in Beijing's central business district in this January 14, 2013 file photo. Credit: Reuters/Jason Lee/FilesBEIJING | Sun Jan 20, 2013 12:11am EST

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