 Research has shown that the ratio of deaths from cancer in Zhenhai rose significantly between 2007 and 2009.From May16 to 17, 2002, residents in Zhenhai launched protests against environmental degradation caused by the chemical industry, blocking the district's traffic on its main streets.In October, 2012, angry people staged demonstrations against a giant petro-chemical project scheduled by ZRCC and clashed with police.