Workers dispose of acidic copper wastewater at a sewage pit in Zijinshan bio-hydrometallurgical copper plant of Zijin Mining Group, Shanghang county, East China's Fujian province, July 13, 2010. The leak of 9,100 cbm of acidic water has plagued Tingjiang, a major river in eastern Fujian and is shedding light on the fragility of China's ecological system due to accelerated industrialization. [Photo/CFP]
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