The Securities and Exchange Commission has rejected Exxon Mobil's bid to block a shareholder proposal that would require it to disclose how its business will be affected by a 2-degree target limit on global warming. The SEC Office of Chief Counsel said it disagrees with the Irving, Texas-based oil company that the proposal is "so inherently vague and indefinite" that neither shareholders nor Exxon Mobil could be certain what it requires.