Ключевые слова: air, alternative, blade, blue, clean energy, clear, colorado, electric utility, electricity, energy, environment, environmental, field, generation, generator, industry, midwest, mill, plant, power, power generator, propeller, renewable, rotate, safe, sky, spin, steel, summer, supply, sustainable, system, technology, tower, towers, turbine, united states, white, wind, windfarm, windmill,