Ключевые слова: air, air conditioning, air pollution, atmosphere, auto, automobile, bumper, busy, car, city, concentration, danger, dioxide, dirty, disaster, drive, ecology, environment, exhaust, fuel, fumes, gas, gasoline, gray, health, horizontal, industry, jam, nature, negative, parts, pipe, polluted, pollution, progress, road, rush, smog, smoke, spare, stop, stress, traffic, traffic image, transport, transportation, vehicle, wheel,