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Duckweeds block a Yangtze River tributary

(chinadaily.com.cn) Updated: 2010-05-28 17:33
Duckweeds block a Yangtze River tributary

Workers clean duckweed floating on the Pengxi River within Yunyang county of Chongqing municipality, May 27, 2010. [Photo/Asianewsphoto]

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