Sophomore students at Pingyang High School in Wenzhou city of East China's Zhejiang province wear masks in class, as a nearby packaging materials plant discharges pungent industrial waste gas, on March 19, 2014. The company, 600 meters east of the school, produced plastic material overnight and discharged untreated emissions. It was shut down under the order of Pingyang County Environmental Protection Bureau after students filed complaints. [Photo/icpress.cn]
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