Ключевые слова: air, asian, background, black, bushes, business, businesswoman, chemical, chinese, city, concept, danger, dirty, disaster, ecology, elegant, environment, equipment, face, filter, gas, hand, human, industry, look, man, mask, men, nature, nuclear, outdoors, people, polluted, pollution, portrait, post, protection, protective, reject, respirator, safety, smog, smoke, suit, toxic, urban, vietnamese, wearing, white, woman,