Reuters: The United States on Thursday finalized its first greenhouse gas emissions rules on automobiles and hiked fuel efficiency standards for the first time since the 1970s, measures Canada imposed as well. The U.S. rules will first apply to 2012 model cars, rolling off production lines next year. They are part of President Barack Obama’s goal to cut emissions of greenhouse gases by about 17 percent under 2005 levels by the year 2020. Obama wants Congress to pass a long-delayed …