Ключевые слова: background, cardboard, closeup, cover, disposal, document, ecology, economy, environment, environmental, friendly, garbage, group, industry, information, manufacture, manufacturing, many, material, materials, mixed, nobody, office, old, paper, papers, paperwork, pile, piled, protection, recovered, recycle, recycled, recycling, reuse, rubbish, stack, stacked, tied, trash, used, waste, wastepaper, white,