Ключевые слова: alternative, battery, building, bulb, business, car, concepts, conservation, contemporary, design, earth, eco, element, energy, environment, factory, flower, fuel, generation, globe, green, home, house, icons, ideas, illustrations, interface, label, lamp, leaf, life, metaphors, nature, panel, panels, planet, power, recycling, shape, sign, solar, sun, symbol, water, wind, windmill,