Ключевые слова: architecture, background, banner, business, circle, city, clean, concept, design, development, earth, eco, ecologic, ecological, ecology, electric, electrical, energy, environment, environmental, friendly, global, globe, green, house, illustration, industrial, leaf, natural, nature, organic, planet, plant, plug, power, recycle, renewable, save, solar cell, sustainability, sustainable, symbol, tree, turbine, waste, white windmills, world,