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Blue-green algae threatens Chaohu Lake

(chinadaily.com.cn) Updated: 2011-10-18 11:58
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Blue-green algae threatens Chaohu Lake

Stones are stained with blue-green algae in Chaohu Lake, Chaohu city, East 皇冠体育app's Anhui province, Oct 17, 2011. [Photo/CFP]

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