Ключевые слова: art, bolt, bottle, bulb, charge, color, colorful, concept, contour, electricity, energy, environmental, garbage, global, globe, hand, icon, internet, isolated, lamp, leaf, lightning, line, linear, map, natural, nature, no, organic, outline, package, panel, planet, plant, plastic, pollution, pop, popart, power, recycle, sea, set, shopping, stop, symbol, waste, world,