Ключевые слова: auto, automobile, background, battery, bio fuel, car, concept, design, design element, drop, eco, ecology, electric, electrical, electricity, energy, environment, environmental, environmental conservation, factory, flat, flower, fuel and power generation, fuel pump, graphic, green, hybrid, hybrid vehicle, icon, icon set, illustration, industry, leaf, lightbulb, nature, nature friendly, plant, pollution, power, recycle, recycling, sign, smog, solar panel, symbol, technology, vehicle, water, wind turbine,