Environmental issues have already been recognized as global risks, and risks such as climate change, water, food crises, and resource depletion have become reality. The purpose of this lecture is to understand the actual situation and background of the growing environmental issues, to know the trends of domestic and foreign policies, and to acquire a basic perspective on how to realize a sustainable world. In classes, you will also learn the importance of understanding actual data and events and grasping things from a medium- to long-term perspective.