On June 11, the EPA proposed two Clean Air Act (CAA) rules that would affect fossil-fuel fired electric generating units (EGUs).  One rule would repeal greenhouse gas (GHG) standards under Section 111 and the second would repeal the 2024 EPA amendments to the mercury and air toxics (MATS) standards.  The proposed rules are a part of the current administration’s stated goal to promote U.S. energy by reducing regulation of the power sector.  The EPA estimates that, together, the two rules will save more than $1.3 billion in regulatory costs per year.  Here are five key takeaways from these proposals.