Ключевые слова: air, atmosphere, black, car, care, combustion, concentration, control, danger, dark, dirty, disaster, drive, ecology, environment, exhaust, exhaust pipe, fuel, gas, gasoline, gray, health, hydrocarbon, industry, influence, medical, medicine, negative, oxide, poison, poisoning, polluted, pollution, road, safe, smog, tire, toxic, traffic, transport, transportation, truck, vehicle, wheel,