Strategic Environmental Assessment (SEA) is a method that helps make plans more environmentally friendly by considering their impact early on. It goes beyond regular Environmental Impact Assessments (EIA) by looking at policies and programs before decisions are made. This approach is important for sustainable development and is becoming more common worldwide. In Korea, they have been using a similar system called the Prior Environmental Review System (PERS) for planning projects. However, the current system mainly focuses on projects, not policies.