Greenwire: U.S. EPA's final Clean Power Plan will no longer base state targets, in part, on estimates about how much they could boost energy efficiency, an administration official said. President Obama on Monday will release the final rule for existing-power-plant carbon emissions that does not include the draft version's "building block 4," the official said, reconfiguring the way states are assigned emissions reduction responsibilities. The change will not limit states' ability to tap energy efficiency...