The National Environmental Policy Act (NEPA) is the landmark environmental law which requires executive agencies to give the public the opportunity to formally review and comment on major federal proposals. These talking points outline the history of the Department of Energy’s NEPA compliance on its various proposals concerning the production of plutonium pits (the fissile cores of nuclear weapons). The conclusion is that DOE’s semi-autonomous National Nuclear Security Administration (NNSA) is legally required to prepare a supplemental programmatic environmental impact statement (PEIS) on its current plan to expand plutonium pit production.