Title: In'gan kwa chigu
Subjects: Forecasting, The Future, Environmental protection, Conduct of life, Foreign relations, Prévision, Futur, Environnement, Protection, Morale pratique, Relations extérieures, Diplomatic relations
Places: Earth (Planet), Korea (South), Terre, Corée du Sud
People: Sun-hyŏng Yu
Time periods: 21st century, 21e siècle