Ключевые слова: america, american, auto, automobile, automotive, car, combustible, conservation, conserve, cost, costly, diesel, dollar, economy, energy, environment, expensive, filling, fuel, gallon, gas, gasoline, guzzler, high, increase, industrial, industry, octane, oil, petrol, petroleum, pollution, power, premium, price, pump, regular, rise, service, shortage, sign, signage, sky, station, tank, transport, transportation, travel, unleaded,