Ключевые слова: alternate, alternative, blade, blue, brown, business, california, cloud, conservation, ecology, efficiency, electric, electrical, electricity, energy, environment, environmental, fan, farm, field, generation, generator, global, green, grid, impact, industrial, industry, landscape, mill, mountains, multi, nature, plant, power, propeller, renewable, resource, sky, solar, spin, technology, tower, turbine, utility, warming, wind, windmill, windy, wings,