Ключевые слова: air, asia, asian, boy, child, climate, concept, danger, dangerous, disease, dust, ecology, energy, environment, epidemic, face, family, flu, global, greenhouse, health, human, industrial, industry, infection, influenza, kid, little, mask, medical, mouth, people, person, pollution, problem, protection, sick, smog, smoke, toxic, virus, warming, wearing, white, young,