People salvage dead fish in Wuhan, Central China's Hubei province, Sept 3, 2013. Dead fish covered more than 40 kilometers of Fuhe River as of Monday, and most of them are 40 to 50 centimeters long. According to the local emergency response office, the incident was caused by excessive ammonia nitrogen density, and the pollution source was not in the city. The river is not the source for drinking water in Wuhan. [Photo/Asianewsphoto]