Kentucky faces challenge of sustainable development (4)
09:31, February 03, 2010 
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Burt Davis briefs the current program of the clean fuel and chemicals group of the Center of Applied Energy Research (CAER) at the University of Kentucky in Lexington, Kentucky, the United States, Feb. 1, 2010. Kentucky, one of the leading coal producing states in the United States, is facing the challenge of sustainable development brought about by its coal industry. (Xinhua/Liu Xin)
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Kentucky faces challenge of sustainable development
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http://english.people.com.cn/90001/90783/91321/6886433.pdf