Chinese police officers, right side, stand guard while people gather to protest the proposed expansion of a petrochemical factory that they say would spew pollution and damage public health, in Ningbo, Zhejiang province, China Saturday, Oct. 27, 2012. Pollution has become a major source of unrest in China, as members of the rising middle class become more outspoken against environmentally risky projects in their backyards. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT, NO LICENSING IN CHINA, FRANCE, HONG KONG, JAPAN AND SOUTH KOREA
