Ключевые слова: alternative, blades, blue, clean, climate, closeup, conservation, efficiency, electricity, energy, environment, generate, green, industry, innovation, lighting, metal, natural, power, production, real, renewable, research, resource, rotate, save, silhouette, sky, spin, supply, sustainable, technology, turbine, vertical, vertical axis, vertical axis wind turbine, verticalaxis, warming, wind, wind turbine, windmill,