Ключевые слова: africa, barren landscape, blue, cloud, conduit, construction, delivering, desert, drill, drilling, energy, engineering, environment, equipment, eternity, exploration, flat, fossil, fuel, gas, gasoline, generation, hydropower, industrial, industry, infinity, landscape, line, machine, natural, oil, oilfield, outdoor, petroleum, pipe, pipeline, plant, power, pump, sand, sky, steel, sun, supply, technology, texas, transmission, tube, water, wilderness,