As South Koreans brace for another sweltering summer, a grim joke has taken hold in casual conversation: “This will be the coolest summer for the rest of our lives.” For many young people, that line is no longer dark humour but a blunt summary of how the climate crisis feels – relentless, immediate and deeply personal. Among South Korea’s young generations, a wave of what experts call “climate anxiety” is reshaping their daily lives, from how they exercise and shop to whether they plan to marry...