Ключевые слова: air, alternative, background, blue, clean, concept, conservation, day, design, earth, eco, ecological, ecology, electric, electricity, energy, environment, environmental, field, future, generator, global, globe, grass, green, illustration, industrial, industry, landscape, life, natural, nature, planet, plant, power, protection, recycle, save, sky, sun, symbol, technology, tree, turbine, white, wind, wind turbine, windmill, world,