Aligning National Environmental Policy Act Process with Environmental Management Systems (EMS) is a guidebook for NEPA and EMS practitioners that identifies elements of an EMS that can improve NEPA implementation. Alignment of NEPA and EMS further enhances both NEPA's goals and the sustainability goals laid out in the Executive Order 13423: " to create and maintain conditions, under which humans and nature can exist in productive harmony, that permit fulfilling the social, economic, and other requirements of the present and future generations of Americans."