Chinese demonstrators shout slogans during a protest against a planned refinery project in downtown Kunming in southwest China's Yunnan province, Thursday, May 16, 2013. About 2,000 demonstrators concerned about pollution took to the streets in southern China to protest plans for a planned refinery on the outskirts of Kunming. Placards and T-shirts read: "The placards read: "No to Kunming PX, (paraxylene)." (AP Photo/Aritz Parra)

Associated Press
Chinese demonstrators shout slogans during a protest against a planned refinery project in downtown Kunming in southwest China's Yunnan province, Thursday, May 16, 2013. About 2,000 demonstrators concerned about pollution took to the streets in southern China to protest plans for a planned refinery on the outskirts of Kunming. Placards and T-shirts read: "The placards read: "No to Kunming PX, (paraxylene)." (AP Photo/Aritz Parra)
Chinese demonstrators shout slogans during a protest against a planned refinery project in downtown Kunming in southwest China's Yunnan province, Thursday, May 16, 2013. About 2,000 demonstrators concerned about pollution took to the streets in southern China to protest plans for a planned refinery on the outskirts of Kunming. Placards and T-shirts read: "The placards read: "No to Kunming PX, (paraxylene)." (AP Photo/Aritz Parra)
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