InsideClimate: he Canadian builder of the Keystone XL pipeline has lashed out at the Environmental Protection Agency for recommending that the United States and Canada work together to reduce the emissions of greenhouse gases from the tar sands crude that the pipeline would carry to refineries on the U.S. gulf coast. The suggestion "ignores the fundamental sovereignty of the Canadian government," said Shawn Howard, a TransCanada spokesman, in a message to reporters on Tuesday. The EPA made its recommendation...