Ключевые слова: accumulator, alternative, arrow, bin, bulb, can, car, charge, conservation, contour, cycle, eco, ecology, electric, electricity, energy, environment, environmental, global, globe, grey, icon, illustration, isolated, lamp, lightning, line, linear, outline, panel, planet, power, recycle, recycled, recycling, renewable, reuse, set, sign, sun, symbol, technology, trash, waste, white, world,