Ключевые слова: air, automobile, background, building, bus, car, carbon, city, cityscape, dense, dirty, downtown, drive, environment, flat, front, global warming, highway, hour, infographic, lane, many, motor, pickup, pollution, problem, road, rush, school bus, skyline, skyscraper, smog, smoke, street, taxi, toxic, traffic jam, transportation, truck, urban, van, vehicle, view, wheel,