CBC: Canadas government is defending its environmental record as thousands attended a climate change rally in Washington, D.C., with hopes of pressuring U.S. President Barack Obama to reject the Keystone XL pipeline.
Environmentalists are staunchly opposed to the planned pipeline, which would carry Alberta oilsands bitumen to refineries along the Texas coast.
They call crude from Alberta's oilsands "dirty oil" and say it contributes to global warming.
Protesters in Washington carried a mock...