Ключевые слова: air, alternative, clean, conservation, design, development, eco, ecological, ecology, efficiency, electric, electrical, electricity, energy, environment, environmental, generation, generator, icon, illustration, industrial, industry, mill, natural, nature, power, propeller, renewable, resource, rotate, rotation, sign, silhouette, source, station, supply, sustainable, symbol, technology, tower, turbine, wind, windmill,