Ключевые слова: battery, bio, bulb, button, car, concept, design, drop, earth, eco, ecological, ecology, electric, electricity, energy, environment, environmental, factory, fuel, globe, green, house, icon, illustration, leaf, light, line, natural, nature, nuclear, planet, plant, pollution, power, recycle, recycling, renewable, save, set, sign, solar, sun, symbol, technology, tree, turbine, water, web, wind,