Ключевые слова: air, analyzing, asia, asian, brainstorming, business, chemical, city, colleague, computer, dirty, disease, downtown, environment, epidemic, face, female, fog, gas, girl, health, internet, lifestyle, mask, medical, metropolis, modern, office, outdoors, person, polluted, pollution, portrait, prevention, problem, protect, protection, protective, quality, safety, sick, smiling, smoke, sneeze, toxic, urban, warming, weather, woman,