The National Environmental Policy Act (NEPA) requires all Federal agencies to consider the effects of their projects and programs on the environment. An example of an environmental effect would be a project that has the potential to increase air pollution. The Farm Service Agency complies with NEPA by completing an environmental review prior to approving a project or program. The type of review that is completed depends on the size of the project or program. For example, smaller projects that have little potential to affect the environment may be reviewed by completion of an environmental worksheet. The potential environmental effects of larger projects and programs are usually addressed by completing a document known as an environmental assessment. If an environmental review determines that adverse effects may result from approval of a project, FSA must either develop solutions referred to as mitigation measures or complete a higher level of review referred to as an environmental impact statement.