CEQ developed this guide to help citizens and organizations effectively participate in Federal agencies’ environmental reviews under the National Environmental Policy Act (NEPA), which requires the consideration of environmental effects in Federal decision making. With some limited exceptions, all Federal agencies in the executive branch have to comply with NEPA before they make final decisions about major Federal actions that could have environmental effects. The Federal Government takes hundreds of actions every day that may be subject to NEPA, including Federal construction projects, plans to manage and develop federally owned lands, and Federal approvals of non-Federal activities such as grants, licenses, and permits.