An environmental impact statement (EIS) is a document that assesses the potential environmental impacts of a proposed project or activity. There are several synonyms for EIS, including environmental assessment (EA), environmental review, and environmental impact assessment (EIA). Each of these terms refers to the same type of document that outlines the potential environmental impacts of a proposed project. However, the specific terminology used may vary depending on the specific regulations or policies in place in different jurisdictions. Regardless of the term used, the purpose of these documents is to ensure that decision-makers are fully informed about the potential environmental impacts of a proposed project before making decisions.