Ключевые слова: air, atmosphere, auto, automobile, blowing, cancer, car, carbon, carbonic, circle, circulation, city, closeup, co2, cone, congestion, damage, dioxide, dirty, disease, double, dual, dust, effect, engine, environment, exhaust, fast, foul, gas, gasoline, green, greenhouse, mechanics, monoxide, muffler, oil, particle, pipe, pollution, rear, rejection, road, smoke, speed, tail, traffic, vent, waste,