Ключевые слова: air, background, bank, banner, business, can, carbon, change, city, civilization, climate, concept, cost, danger, dirty, eco, ecological, ecology, energy, environment, environmental, female, future, generation, girl, global, heritage, industry, lack, mask, money, nature, oxygen, pollution, problem, purchase, sale, save, seoul, smog, smoke, sustainable, toxic, woman, world,