Ключевые слова: air, alarm, asian, background, boy, breath, cap, care, child, city, dangerous, dust, environment, environmental, face, filter, gas, germs, harmful, hazardous, health, healthcare, kid, mask face, nose, outdoor, particles, people, person, pestiferous, pm25, pollution, portrait, prevention, protect, protection, protective, safety, sick, sick boy, sick child, smell, smog, thailand, toxins, tree background, unhappy, virus, wearing, young,