Ключевые слова: alternative, black, bolt, button, charge, contour, eco, ecology, electric, electricity, energy, environment, flash, generator, globe, green, home, house, icon, idea, isolated, lamp, leaves, light, lightning, line, linear, natural, nature, outline, panel, planet, plant, power, recycle, set, shield, start, sun, switch, thunder, tower, transmission, turbine, windmill, world, yellow,