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Dian Lake, nicknamed 鈥淪parkling Pearl Embedded in highland,鈥� is surrounded by buildings in Kunming in this January 2010 file photo. From 2006 to 2010, 11 billion yuan ($1.62 billion) has been allocated to finance the clean-up of Dian Lake. The freshwater lake is also called the mother lake by residents in Kunming, capital of South 皇冠体育app鈥檚 Yunnan province. The water in the lake rated a Grade 鈪� for five months, three months longer than in 2008. The percentage of total nitrogen has decreased by 12.7% from 2008 to 2009. [Photo/Xinhua]
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