Reuters: U.S. President Barack Obama amplified the concerns of environmentalists about the Keystone XL oil pipeline on Friday and repeated his own reservations the project would have few benefits, but said he has not made a decision on the project.
Obama, explaining the debate over the pipeline to a group of students, described concerns about the "extraordinarily dirty" extraction methods for Canadian oilsands - a description the Canadian government has long argued is unfair.
"The reason that a lot...