On Tuesday, administrator Scott Pruitt signed the paperwork to revoke the Clean Power Plan. But what is the case for its repeal? And what happens next in the search to rein in carbon dioxide pollution?We've heard from many of the proponents of the Clean Power Plan over the past few months, but on this week's episode, we talk to someone who opposed it and hear why he thought it should have never been written in the first place. Jeff Holmstead has worked on environmental issues for previous Republican administrations, including a stint as assistant administrator for air and radiation at the EPA under George W. Bush.