Ключевые слова: 3d, alternative, art, auto, battery, cable, charging, clean, color, colorful, contour, design, eco, ecology, electric, electricity, element, energy, environment, fuel, gradient, green, home, house, icon, illustration, isolated, isometric, leaf, line, linear, lineart, natural, nature, outline, plant, plug, power, recycle, renewable, sign, station, symbol, technology, transportation, vehicle,