Reuters: A small aboriginal village downstream from Alberta’s massive oil sands plants is calling for a moratorium on new projects in the region after a study found high levels of heavy metals and carcinogens in its fish and drinking water. The village of Fort Chipewyan, Alberta, a one-time trading post on the northeast shore of Lake Athabasca with a population of 1,400, says oil sands developments may be responsible for rare types of cancer in the community, poor water quality and other …