Ключевые слова: art, barrel, bin, building, bulb, can, clean, color, colorful, container, contour, ecology, energy, environment, fuel, gas, globe, hand, icon, illustration, industrial, industry, isolated, lamp, lightning, line, linear, no, outline, package, panel, planet, plastic, pollution, pop, popart, power, recycle, recycled, recycling, rubbish, sea, set, shopping, symbol, trash, waste, world,