Maclean's reports that "Canadian and U.S. officials are actively 'assessing' potential cooperation on regulations to reduce carbon emissions in the oil and gas sectors, according to a letter from Canada’s Ambassador to Washington, Gary Doer, to the U.S. Secretary of State, John Kerry. Doer’s letter was submitted as part of the public comment period in the review of the proposed Keystone XL pipeline being run by the State Department. The pipeline would bring diluted bitumen from northern Alberta to refineries on the Gulf Coast and is being opposed by environmentalists."
"Most of Doer’s letter makes the Harper government’s familiar case in favour of the pipeline. In a section on climate change, he also notes that there are now active efforts between the two countries to come up with measures to reduce emissions from the oil sands. President Obama has said he will only approve the pipeline if it does not significantly exacerbate carbon pollution."