Ключевые слова: bore, business, calculations, car, circle, container, control, cooperation, coordination, cycle, danger, developing, disaster, drill, ecology, environment, extraction, factory, fire, flame, fuel, future, gain, helmet, humanity, ignitation, illustrations, link, man, monopoly, nature, oil, oil well, petrol station, pipe, planet, plant, pollution, problem, production, risk, smoke, stock, suit, supply, system, transportation,