Energy Biz.  Sen. Jim Inhofe urged his colleagues on Tuesday to support his effort to kill a new air pollution rule, while an Arkansas senator called Inhofe’s proposal "over the top" and said it would allow utility companies to pollute at will.  Inhofe, R-Tulsa, has been trying to round up support to block the implementation of a rule that would limit the emissions of mercury and toxic chemicals from power plants.  In a speech on the Senate floor, Inhofe said the rule is part of President Barack Obama’s "war on coal" and that it would cost jobs in numerous coal-producing states while raising consumers’ electricity bills.