Associated Press: China’s environment ministry said Thursday that it has ordered an ecological assessment for a proposed Yangtze River dam that conservationists fear could threaten hundreds of fish species and drive the giant Chinese sturgeon into extinction. Chinese environmentalists and scientists are trying to halt the Xiaonanhai dam, upstream from Chongqing city in mountainous western China, saying that it and two other dams would flood most of the last remaining fish reserve on the Yangtze, …