BEIJING - DECEMBER 13: A wind turbine is seen at sunset on the south bank of Guanting Reservoir on December 13, 2007 in Beijing, China. Beijing has put forward 'Green Olympics' as one of the three themes for the 2008 Olympic Games. Guanting Wind Power Field will begin operation at the end of this month with 33 wind turbines producing 50,000 kw, according to local media. China has accelerated its development of wind resources and other clean energy to meet its vast long-term energy needs, and help to achieve the 'Green Olympic' goal.