Oil spill fuels pipeline worries

摘要

AH, THE beautiful wilds of western Canada. Rivers, mountains, forests... and out-of-control oil leaks that have already spurted thousands of barrels of toxic bitumen into the environment.The leaks were caused by an underground blowout at a tar sand project in north-east Alberta run by Canadian Natural Resources that had been certified safe by government regulators. Since May, there have been leaks through surface fissures at four of the firm's sites in the area, raising questions about how well the safety of tar sands operations can be assessed. The company extracts