Earthjustice respectfully submits the following comments on behalf of Natural Resources Defense Council, the Sierra Club, the D.C. Environmental Network, and Public Citizen. For the benefit of their members and the public, each of these organizations shares a common interest in ensuring that each agency in the Federal government takes prompt action to advance energy efficiency and reduce both its local environmental footprint and its contribution to global warming. Department of Energy (“DOE”) leadership, guidance, and regulatory action, including the proposed rules addressed in these comments, are essential to this effort. In these comments, part I discusses the importance of improving the energy efficiency and sustainability of Federal buildings through completion of the above‐described proposed rule and all related building standards and requirements without further delay. Then, in part II, we provide specific comments regarding certain elements of the proposed rule for consideration by DOE. We appreciate your consideration of these comments and would welcome further information from DOE regarding the regulatory actions discussed herein.