Ключевые слова: calm, city, clean, clouds, conservation, dam, day, design, development, earth, ecology, electricity, energy, environment, forest, future, generation, green, growth, impact, infrastructure, lake, light, modern, mountain, nature, peaceful, planet, plants, potential, power, progress, quiet, reflection, renewable, resources, river, scene, serene, sky, solution, source, stream, sustainable, system, trees, turbine, water, world,