Ключевые слова: alternative, app, battery, bicycle, bio, car, care, color, computer, design, eco, ecological, ecology, electric, electricity, environment, factory, fuel, gas, green, icon, illustration, industry, internet, leaf, lightbulb, natural, nature, oil, pictogram, plant, plug, pollution, power, recycle, recycling, renewable, set, sign, silhouette, simple, solar, station, symbol, tree, umbrella, web, wind,