The document provides guidance from the European Commission on strategic environmental assessment and the environmental impact assessment process. It discusses three key stages of EIA: screening, scoping, and review of environmental impact statements. The guidance describes the screening requirements in the European Union, including determining if EIA is mandatory, exempt, or requires case-by-case examination based on the project type and potential environmental impacts. It outlines the screening process and provides tools to help determine if a project is likely to have significant environmental effects.