Residents walk across the frozen Songhua River in front of smoke stacks at Jiamusi, in China’s northeast Heilongjiang province Sunday Dec. 4, 2005. A water plant in Jiamusi, a city of about 480,000 people, was shut down Friday, as China’s chief environmental regulator resigned, taking the blame for a chemical spill into the Songhua River which has forced five Chinese cities to stop water supply, and strained relations with Russia. The slick of toxic benzene is expected to arrive in Jiamusi Tuesday. (AP Photo/Greg Baker)