FORT CHIPEWYAN, Canada — In 2006, Canadian doctor John O’Connor made a startling realization. Specialists had diagnosed three of his patients in the northern Alberta village of Fort Chipewyan with cholangiocarcinoma — a deadly cancer of the bile duct. The same cancer had killed his own father years earlier in Ireland. Only about one in 100,000
阿尔伯塔省焦油砂污染疑似罕见癌症病例
当奥巴马总统决定是否否决 Keystone XL 管道时，在拟议的源头发现了人类和鱼类疾病的证据。
