A woman holds a sign as she participates in a protest against a battery factory in front of the local government building of Songjiang district, on the outskirts of Shanghai May 1, 2013. According to local media, Hefei Guoxuan High-tech Power Energy Co Ltd plans to build a lithium ion battery factory on a 23.1-acre plot in the Songjiang Industrial Park, the largest of its kind in eastern China. Local residents say they are worried the facility will pollute their water supply and foul the air. The sign reads, "I love Songjiang! Strongly against building Guoxuan battery factory in Songjiang!" REUTERS/Carlos Barria (CHINA - Tags: POLITICS ENVIRONMENT CIVIL UNREST BUSINESS)