Ключевые слова: alternative energy, antipollution, arrow, battery, bio, biodiesel, car, collection, drop, eco, ecological, ecology, electric, electricity, energy, environment, environmental, flower, garbage, gas pump, globe, green, house, hybrid, icon, industry, leaf, light bulb, natural, nature, nuclear, plant, pollution, power plant, recycle, recycling, renewable, set, sign, silhouette, solar energy, solar panel, sun, symbol, tree, water, web, wind, wind turbines,