"The surging shale energy output in recent years has been centering in North America, but it can also happen in other places like China, a US energy expert said Friday. Shale gas will come to play a more important role in China's energy mix in the long term, said IHS Cambridge Energy Research Associates Chairman Daniel Yergin at a seminar on energy boom in North America. "China has great potential for shale gas but it will take perhaps five to 10 years to develop, due to the lack of infrastructure and logistic capabilities," Yergin told Xinhua." (Quoted from article)