Ключевые слова: alternative, architecture, blue, building, clean, concrete, construction, dam, eco, ecology, electric, electricity, energy, engineering, environment, environmental, factory, flow, generation, generator, green, hydro, hydroelectric, hydropower, icon, illustration, industrial, industry, lake, landscape, natural, nature, outdoors, plant, power, renewable, reservoir, resource, river, sky, station, structure, sustainable, technology, transmission, turbine, water,