This module provides a set of basic guidelines for applying an "ecosystem approach" as part of an integrated environmental assessment. Among other things, it can help users to systematically consider the services that ecosystems are providing in a particular area--including provisioning (e.g., food, timber and agriculture), regulating (e.g., climate regulation and water quality), support (e.g., pollination or nutrient cycling) and cultural services, as defined in the Millennium Ecosystem Assessment.