Ключевые слова: arrow, bio, bulb, car, co2, earth, eco, ecological, ecology, electricity, energy, environment, factory, flower, food, fuel, garbage, global, globe, green, home, house, icon, leaf, light, light bulb, lightbulb, natural, nature, oil, organic, petroleum, plant, plug, pollution, power, recycle, save, soil, solar cell, solar energy, sorting, sun, sun light, tree, turbine, water, wind, wind turbine, world,