Aug. 11, 2009 (China Knowledge) - Duke Energy, the third-largest electric power holding company in the U.S., on Monday signed a memorandum of understanding with China Huaneng Group, the parent of Huaneng Power International Inc<600011><0902><HNP>, to explore a variety of renewable and other clean-energy technologies to deal with global warming.
Pursuant to the MOU, senior execut
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