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Energy Secretary visits energy company in Tianjin

U.S. Secretary of Energy Steven Chu (R) looks at tubes carrying algae, a promising oil alternative, while touring China's innovative, 'new energy' giant ENN's showroom and campus in Tianjin on July 17, 2009. Ending his first official visit to China, Chu said the two nations had agreed to plan joint studies on ways to improve the energy efficiency of buildings, a major issue in addressing ChinaÕs contribution to climate change. (UPI Photo/Stephen Shaver)

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