Grist: Last week, the controversial Keystone XL pipeline, which would transport oil from the Alberta tar sands to the Gulf of Mexico, hit another snag: The State Department`s Office of the Inspector General said that it is investigating a possible conflict-of-interest issue in the project`s environmental impact study. The inspector general is probing whether the company that produced the environmental impact study, Environmental Resource Management, failed to disclose its past working relationship with...