Ключевые слова: air, asia, background, bad, building, business, city, cityscape, climate, cloud, dirty, downtown, dusk, dust, environment, environmental, evening, factory, fine, gas, global, haze, landmark, light, modern, morning, orange, outdoor, pm25, polluted, pollution, red, risk, sky, skyline, skyscraper, smog, smoke, sun, sunlight, sunrise, sunset, tower, toxic, travel, unhealthy, urban, view, warming, wind,