Ключевые слова: air, alternative, background, black, clean, concept, design, development, eco, ecology, efficiency, electric, electricity, energy, environment, environmental, farm, flat, generation, generator, gold, golden, green, icon, illustration, industrial, industry, innovation, isolated, long, mill, nature, power, propeller, renewable, rotate, rotation, shadow, sign, silhouette, supply, sustainable, symbol, technology, tower, turbine, wind, windmill,