Associated Press: President Barack Obama ordered the federal government on Thursday to cut its emissions of greenhouse gases by 40 percent, as the U.S. seeks to spur other nations to get serious about climate change. Obama's executive order also directs the government to ramp up use of renewable energy sources to 30 percent of the federal government's consumption. The White House said U.S. taxpayers could save up to $18 billion in electricity costs by reducing greenhouse gases 40 percent over the next decade, compared...