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Willow warning: Catkins are pretty, but carry potential health risks

(chinadaily.com.cn / CRI) Updated: 2016-04-09 11:59
Willow warning: Catkins are pretty, but carry potential health risks

Middle school students use books to shield themselves from the catkins in Zhengzhou, Henan province, March 28, 2016. [Photo/VCG]

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