Ключевые слова: biodegradable, cardboard, cardboard box, collection, copy space, disposal, ecofriendly, ecology, environmental, garbage, material, package, packaging, pap 21, paper, paper recycling, paperbased products, paperboard, pollution, recycle, recycling, reusable, reuse, sign, sort, sustainability, sustainable, symbol, trash, waste, waste sorting, zero waste,