An aerial view of buildings standing out amid haze engulfing Wuhan, central China's Hubei province on December 3, 2009. China will need to invest up to 30 billion dollars a year to meet its goal of curbing greenhouse gas emissions, the state press said, citing an academic study, as Beijing set its targets before world leaders gather in Copenhagen this month for talks on negotiating a new global warming pact to replace the Kyoto Protocol that expires in 2012. CHINA OUT AFP PHOTO (Photo credit should read STR/AFP/Getty Images)