YUNNAN, May 20, China.org.cn - Yunnan has been working hard against water pollution in the Dianchi Lake since 2011. A report released by China's Ministry of Environmental Protection last year revealed that pollution in the Dianchi Lake was rated as "severe".

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Photo taken on May 17, 2015 shows an overlook of the Dianchi Lake surrounded with constructed wetlands and ecological forests in Kunming, capital of southwest China's Yunnan Province. [Photo/Xinhua]