Ключевые слова: aerial, america, architecture, big, bridge, built, color, concrete, construction, control, dam, desert, electric, electricity, energy, engineering, environment, flow, flowing, forest, generation, generator, high, hydro, hydroelectric, industrial, industry, lake, landmark, landscape, large, mountain, nature, outdoors, plant, power, reservoir, river, rocks, scene, sky, station, structure, supply, technology, tourism, travel, view, wall, water,