The Government Accountability Office (GAO) has released its report on the Obama Administration Working Group’s development of “social cost of carbon” estimates. As we at IER have explained in extensive detail—in our formal comment submitted to Office of Management and Budget (OMB), at our conference last summer, and in testimony before the Senate—there are serious problems with the procedure by which the Administration derived these estimates. Yet the GAO report conveniently ignores all of these problems, at times actively misleading the innocent reader.