Ключевые слова: 25, air, allergy, asian, care, city, concept, contamination, danger, disease, dust, environment, environmental, face, filter, fog, guy, health, healthy, human, male, man, mask, medical, mist, mouth, particle, people, person, pm, pollution, prevent, prevention, problem, protection, protective, quality, safety, sick, smog, smoke, thailand, unhappy, urban, virus, wear, wearing, white, young,